Automatic Knives Switchblade Knife Switchblades Italian Stilettos Swing Guard Picklock Out The Front Opening Stiletto Swinguard Lever Lock Knifes Information and Term Glossary

Switchblade Specialties

Automatic Knives Switchblade Knife Switchblades Italian Stilettos Swing Guard Picklock Out The Front Opening Stiletto Swinguard Lever Lock Knifes Information and Term Glossary

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Specializing In High - Tech Automatic Switchblade Knives, Automatic Knives, Switchblade Knives, Switchblades, Classic Italian Style Stilettos, Italian Style Swing Guard Stilettos, Front Opening Automatics, Daggers, Fishtail Picklocks, Covert Dual Action Automatics, Lever Lock Switchblades and Custom Handmade Switchblades For Law Enforcement, Government and Military Personnel; as well as The Modern Day KNIFE COLLECTOR.

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SWITCHBLADES

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SWITCHBLADE TERMS GLOSSARY

Switchblade (side opening & front opening - OTF): A pocketknife having a spring-operated blade that opens instantly when a release on the handle is pressed. Also called switchblade knife, switch knife, automatic knife, stiletto, picklock, swing guard knife, front opener (OTF out-the front), front opening knife (OTF out-the-front), lever lock, spring knife, push button knife, one-handed knife, dual action knife, scale release, bolster release.

Automatic knife (side opening & front opening - OTF): A pocketknife having a spring-operated blade that opens instantly when a release on the handle is pressed. Also called switchblade knife, switch knife.

Switchblade knife (side opening & front opening - OTF): a pocketknife with a spring-operated blade [syn: switchblade].

Italian Style Stiletto (side opening): Italian, diminutive of stilo stylus, dagger, from Latin stilus stylus -:
a slender side opening dagger with a blade thick in proportion to its breadth; distinguishable by it's swivelling bolster (hand guard) that lifts the spring lock off the blade post with a clockwise turn of the bolster; - as opposed to the "picklock" which you have to pick the spring lock off the blade post with your fingers.

Picklock (side opening): Same as the Italian style stiletto with the exception of the swivelling bolster (hand guard) - picklocks have a wider tab on the spring end for easier gripping of the spring for lifting the spring lock off the blade post with the fingers - thus the name "Picklock" meaning you have to actually pick up on the lock manually.

Swing guard (floating guard) knife (side opening): Side opening knife which has a hand guard attached to the blade that swings (floats) with the blade. Guard folds down against the handle, out of the way, when blade is closed. Guard folds out perpendicular to blade and handle when blade is open, creating a guard between blade and handle.

Dual action automatic (side opening): A pocketknife having a spring-operated blade that opens instantly when a release on the handle is pressed and also is capable of being opened manually as well.

Covert automatics (side opening): A pocketknife having a spring-operated blade that opens instantly when a hidden (not easily found or recognized as a release mechanism) release is activated and also is capable of being opened manually as well.

Front opening - OTF (out the front) automatic: A pocketknife having a spring-operated blade that comes straight out the front of the handle (as opposed to swinging open from the side) that opens instantly when a release on the handle is pressed. Manual recharging (cocking) of the blade on single action OTF's.

Dual action front opening - OTF (out-the-front) automatic: Same as front opening - OTF (out-the-front) automatic except that the release on the handle will retract the blade automatically as well, as opposed to the manual recharging (cocking) of the blade to the closed position.

Lever lock automatics (side opening): A pocketknife having a spring-operated blade that opens instantly when a release lever (as opposed to a button) on the handle is pressed.

Scale release automatics (side opening): A pocketknife having a spring-operated blade that opens instantly when a scale (handle half) is slid to 1 side.

Bolster release automatics (side opening): A pocketknife having a spring-operated blade that opens instantly when a bolster (metal piece between the handle and blade) is slid to 1 side.

Italian Style Stiletto Blade Types

Standard: Highly reflective mirror-like finish. This blade is used to cut and it is not razor edge. This is the most common type of blade.

Bayonet: Highly reflective mirror-like finish. This is the blade with the back edge ground to a near edge approximately 42% of the blades overall length (from the tip rearward)

Dagger: This is a full double edge blade. However, the back edge is not sharpened.

Kris: This is a blade to collect. An injury of a kris blade cicatrizes with more difficulty. It's shape resembles a snake.

Damascus (standard, bayonet, dagger, kris): Damascus steel is formed with hundreds of layers of iron and steel that are forged together to produce a high carbon (or stainless) blade with distinctively individual patterns. The art of damascus steel making goes back thousands of years.

Blade Steel

The Steel FAQ's by Joe Talmadge

One thing to keep in mind is that there's more to knife performance than the steel. The blade profile is also important (a tanto format isn't the best choice to skin a deer, for example). But perhaps most important is the heat treatment. A good solid heat treatment on a lesser steel will often result in a blade that outperforms a better steel with inferior heat treatment. Bad heat treatment can cause a stainless steel to lose some of its stainless properties, or cause a tough steel to become brittle, etc. Unfortunately, of the three most important properties (blade profile, steel type, heat treatment), heat treatment is the one that is impossible to assess by eye, and as a result excessive attention is sometimes paid to the other two.

Remember also to keep your particular application in mind. 440A is often scoffed at, but I'd rather have my salt water dive knife made of 440A than L-6. Properly heat treated 5160 is wonderfully tough, but if my application is skinning deer, I'm probably more interested in edge holding ala 52100. And on and on.

Steel Alloys: At its most simple, steel is iron with carbon in it. Other alloys are added to make the steel perform differently. Here are the important steel alloys in alphabetical order, and some sample steels that contain those alloys:

Carbon: Present in all steels, it is the most important hardening element. Also increases the strength of the steel. We usually want knife-grade steel to have >.5% carbon, which makes it "high-carbon" steel. Chromium: Added for wear resistance, hardenability, and (most importantly) for corrosion resistance. A steel with at least 13% chromium is deemed "stainless" steel. Despite the name, all steel can rust if not maintained properly. Manganese: An important element, manganese aids the grain structure, and contributes to hardenability. Also strength & wear resistance. Improves the steel (e.g., deoxidizes) during the steel's manufacturing (hot working and rolling). Present in most cutlery steel except for A-2, L-6, and CPM 420V. Molybdenum: A carbide former, prevents brittleness & maintains the steel's strength at high temperatures. Present in many steels, and air-hardening steels (e.g., A-2, ATS-34) always have 1% or more molybdenum -- molybdenum is what gives those steels the ability to harden in air. Nickel: Used for strength, corrosion resistance, and toughness. Present in L-6 and AUS-6 and AUS-8. Silicon: Contributes to strength. Like manganese, it makes the steel more sound while it's being manufactured. Tungsten: Increases wear resistance. When combined properly with chromium or molybdenum, tungsten will make the steel to be a high-speed steel. The high-speed steel M-2 has a high amount of tungsten. Vanadium: Contributes to wear resistance and hardenability. A carbide former that helps produce fine-grained steel. A number of steels have vanadium, but M-2, Vascowear, and CPM T440V and 420V (in order of increasing amounts) have high amounts of vanadium. BG-42's biggest difference with ATS-34 is the addition of vanadium.

CARBON and alloy steels (non-stainless steels):

These steels are the steels most often forged. Stainless steels can be forged (guys like Sean McWilliams do forge stainless), but it is very difficult. In addition, carbon steels can be differentially tempered, to give a hard edge-holding edge and a tough springy back. Stainless steels are not differentially tempered. Of course, carbon steels will rust faster than stainless steels, to varying degrees. Carbon steels are also often a little bit less of a crap shoot than stainless steels -- I believe all the steels named below are fine performers when heat treated properly.

In the AISI steel designation system, 10xx is carbon steel, any other steels are alloy steels. For example, the 50xx series are chromium steels.

In the SAE designation system, steels with letter designations (e.g., W-2, A-2) are tool steels.

There is an ASM classification system as well, but it isn't seen often in the discussion of cutlery steels, so I'll ignore it for now.

Often, the last numbers in the name of a steel are fairly close to the steel's carbon content. So 1095 is ~.95% carbon. 52100 is ~1.0% carbon. 5160 is ~.60% carbon.

O-1 - This is a steel very popular with forgers, as it has the reputation for being "forgiving". It is an excellent steel, that takes and holds an edge superbly, and is very tough. It rusts easily, however. Randall Knives uses O-1, so does Mad Dog.

W-2 - Reasonably tough and holds an edge well, due to its .2% vanadium content. Most files are made from W-1, which is the same as W-2 except for the vanadium content (W-1 has no vanadium).

The 10-series -- 1095 (and 1084, 1070, 1060, 1050, etc.) - Many of the 10-series steels for cutlery, though 1095 is the most popular for knives. When you go in order from 1095-1050, you generally go from more carbon to less, from better edge holding to less edge holding, and tough to tougher to toughest. As such, you'll see 1060 and 1050, used often for swords. For knives, 1095 is sort of the "standard" carbon steel, not too expensive and performs well. It is reasonably tough and holds an edge very well. It rusts easily. This is a simple steel, which contains only two alloying elements: .95% carbon and .4% manganese. The various kabars are usually 1095 with a black coating.

Carbon V - Carbon V is a trademarked term by Cold Steel, and as such is not necessarily one particular kind of steel; rather, it describes whatever steel Cold Steel happens to be using, and there is an indication they do change steels from time to time. Carbon V performs roughly between 1095-ish and O-1-ish, in my opinion, and rusts like O-1 as well. I've heard rumors that Carbon V is O-1 (which I now think is unlikely) or 1095. Numerous industry insiders insist it is 0170-6. Some spark tests done by a rec.knives reader seem to point the finger at 50100-B. Since 50100-B and 0170-6 are the same steel (see below), this is likely the current Carbon V.

0170-6 & 50100-B - These are different designations for the same steel: 0170-6 is the steel makers classification, 50100-B is the AISI designation. A good chrome-vanadium steel that is somewhat similar to O-1, but much less expensive. The now-defunct Blackjack made several knives from O170-6, and Carbon V may be 0170-6. 50100 is basically 52100 with about 1/3 the chromium of 52100, and the B in 50100-B indicates that the steel has been modified with vanadium, making this a chrome-vanadium steel.

A-2 - An excellent air-hardening tool steel, it is known for its great toughness and good edge holding. As an air-hardening steel, so don't expect it to be differentially tempered. Its outstanding toughness makes it a frequent choice for combat knives. Chris Reeve and Phil Hartsfield both use A-2, and Blackjack made a few models from A-2.

L-6 - A band saw steel that is very tough and holds an edge well, but rusts easily. It is, like O-1, a forgiving steel for the forger. If you're willing to put up with the maintenance, this may be one of the very best steels available for cutlery, especially where toughness is desired.

M-2 - A "high-speed steel", it can hold its temper even at very high temperatures, and as such is used in industry for high-heat cutting jobs. It is an excellent edge holder. It is tough but not as tough as some of the toughest steels in this section; however, it will still be tougher than the stainless steels and hold an edge better. It rusts easily. Benchmade has started using M-2 in one of their AFCK variations.

5160 - A steel popular with forgers, it is extremely popular now and a very high-end steel. It is essentially a simple spring steel with chromium added for hardenability. It has good edge holding, but is known especially for its outstanding toughness (like L-6). Often used for swords (hardened in the low 50s Rc) because of its toughness, and is also used for hard use knives (hardened up near the 60s Rc).

52100 - A ball-bearing steel, and as such is only used by forgers. It is similar to 5160 (though it has around 1% carbon vs. 5160 ~.60%), but holds an edge better. It is less tough than 5160 however. It is used often for hunting knives and other knives where the user is willing to trade off a little of 5160's toughness for better edge holding.

D-2 - D-2 is sometimes called a "semi-stainless". It has a fairly high chrome content (12%), but not high enough to classify it as stainless. It is more stain resistant than the carbon steels mentioned above, however. It has excellent edge holding, but may be a little less tough than some of the steels mentioned above. And it does not take a beautiful finish. Bob Dozier uses D-2.

Vascowear - A very hard-to-find steel, with a high vanadium content. It is extremely difficult to work and very wear-resistant. It is out of production.

"STAINLESS" Steels:

Remember that all steels can rust. But the following steels, by virtue of their > 13% chromium, have much more rust resistance than the above steels. I should point out that there doesn't appear to be consensus on what percent of chromium is needed for a steel to be considered stainless. In the cutlery industry, the de-facto standard is 13%, but the ASM Metals Handbooks says "greater than 10%", and other books cite other numbers. In addition, the alloying elements have a strong influence on the amount of chromium needed; lower chromium with the right alloying elements can still have "stainless" performance.

420 - Lower carbon content (<.5%) than the 440 series makes this steel extremely soft, and it doesn't hold an edge well. It is used often for diving knives, as it is extremely stain resistant. Also used often for very inexpensive knives. Outside salt water use, it is too soft to be a good choice for a utility knife.

440 A & 440 B & 440C - The carbon content (and hardenability) of this stainless steel goes up in order from A (.75%) to B (.9%) to C (1.2%). 440C is an excellent, high-end stainless steel, usually hardened to around 56-58 Rc. All three resist rust well, with 440A being the most rust resistant, and 440C the least. The SOG Seal 2000 is 440A, and Randall uses 440B for their stainless knives. 440C is fairly ubiquitous, and is generally considered the penultimate general-use stainless (with ATS-34 being the ultimate). If your knife is marked with just "440", it is probably the less expensive 440A; if a manufacturer had used the more expensive 440C, he'd want to advertise that. The general feeling is that 440A (and similar steels, see below) is just good enough for everyday use, especially with a good heat treat (we've heard good reports on SOG's 440A heat treat). 440-B is a very solid performer and 440-C is excellent.

425M & 12C27 - Both are very similar to 440A. 425M (.5% carbon) is used by Buck knives. 12C27 (.6% carbon) is a Scandanavian steel used often in Finish puukkos and Norwegian knives.

AUS-6 & AUS-8 & AUS-10 - (aka 6A 8A 10A) - Japanese stainless steels, roughly comparable to 440A (AUS-6, .65% carbon) and 440B (AUS-8, .75% carbon) and 440C (AUS-10, 1.1% carbon). AUS-6 is used by Al Mar. Cold Steel's use of AUS-8 has made it pretty popular, as heat treated by CS it won't hold an edge like ATS-34, but is a bit softer and may be a bit tougher. AUS-10 has roughly the same carbon content as 440C but with slightly less chromium, so it should be a bit less rust resistant but perhaps a bit tougher than 440C. All 3 steels have some vanadium added (which the 440 series lacks), which will improve wear resistance.

GIN-1 - aka G-2 A steel with slightly less carbon, slightly more chromium, and much less moly than ATS-34, it is used often by Spyderco. A very good stainless steel.

ATS-34 & 154-CM - The hottest high-end stainless right now. 154-CM is the original American version, but for a long time was not manufactured to the high quality standards knifemakers expect, and so is not used often anymore. Late-breaking news is that high-quality 154-CM may again be available. ATS-34 is a Hitachi product that is very, very similar to 154-CM, and is the premier high quality stainless. Normally hardened to around 60 Rc, it holds an edge very well and is tough enough even at that high hardness. Not quite as rust resistant as the 400 series above. Many custom makers use ATS-34, and Spyderco (in their high-end knives) and Benchmade are among the production companies that use it.

ATS-55 - Similar to ATS-34, but with the moly removed and some other elements added. Not much is known about this steel yet, but it looks like the intent was to get ATS-34 edge-holding with increased toughness. Since moly is an expensive element useful for high-speed steels, and knife blades do not need to be high speed, removing the moly hopefully drastically decreases the price of the steel while at least retaining ATS-34's performance. Spyderco is using this steel.

BG-42 - Bob Loveless announced recently that he's switching from ATS-34 to this steel. Keep an eye out for it, it's bound to catch on. BG-42 is somewhat similar to ATS-34, with two major differences: It has twice as much manganese as ATS-34, and has 1.2% vanadium (ATS-34 has no vanadium), so look for even better edge-holding than ATS-34. Chris Reeves has switched from ATS-34 to BG-42 in his Sebenzas.

CPM T440V & CPM T420V - Two steels that hold an edge superbly (better than ATS-34), but it's difficult to get the edge there in the first place. These steels are both high in vanadium. Spyderco offers at least one model in CPM T440V. Custom maker Sean McWilliams is a big fan of 440V, which he forges. Depending on heat treatment, expect to have to work a bit harder to sharpen these steels -- also, don't expect ATS-34 type toughness. 420V is CPM's follow-on to 440V, and with less chromium and almost double the vanadium, is more wear-resistant and may be tougher than 440V.

400 Series Stainless - Before Cold Steel switched to AUS-8, many of their stainless products were marketed as being of "400 Series Stainless". Other knife companies are beginning to use the same term. What exactly *is* 400 Series Stainless? I always imagined it was 440-A, but there's nothing to keep a company from using any 4xx steel, like 420 or 425M, and calling it 400 Series Stainless.

NON-STEELS USED BY KNIFEMAKERS

Cobalt - Stellite 6K A flexible material with very good wear resistance, it is practically corrosion resistant. Stellite 6K, sometimes seen in knives, is a cobalt alloy. David Boye uses cobalt for his dive knives.

Titanium - Newer titanium alloys can be hardened near 50 Rc, and at that hardness seem to take something approaching a useful edge. It is extremely rust-resistant, and is non-magnetic. Popular as expensive dive knives these days, because the SEALs use it as their knife when working around magnetic-detonated mines. Mission knives uses titanium. Tygrys makes a knife with a steel edge sandwiched by titanium.

Closing a Picklock

Lift (pick) spring tab (lock) off blade post manually

Closing an Italian Style Stiletto

Push button side guard clock-wise and downward

Opening the Covert (hidden release) Automatics

Case XX Mini Copperlock Dual Action

Press "C" end of shield for spring action on Case Mini Copperlock

Colt M-16 Dual Action

Press lower end of upper insert for spring action on Colt M-16

Smith & Wesson (S.W.A.T.) Single Action

Press upper end of upper insert for spring action on Smith & Wesson (S.W.A.T.)

Timberline/Vallotton Dual Action

Slide top handle away from blade for spring action on Timberline/Vallotton

Al Mar/Vallotton Dual Action

Slide top handle away from blade for spring action on Al Mar/Vallotton SERE 2000

Delta Z/ Vallotton Dual Action

Slide top handle away from blade for spring action on Delta Z/Vallotton

Emerson/Vallotton Dual Action

Slide top handle away from blade for spring action on Emerson/Vallotton

Scale Release Single Action

Slide lower end of top handle toward blade for spring action on most automatic only scale release knives

Silk Slipper Dual Action

Slide top handle away from blade for spring action on Butch Vallotton's Silk Slipper

Microtech Lightfoot (LCC) Dual Action

Slide bolster away from blade for spring action on Microtech's Lightfoot

ProTech Harkins ATAC Dual Action

Press lower end of upper insert for spring action on ProTech Harkins ATAC

Email: Rick@theSWITCHBLADE.com

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