Instead of relying on simple friction and spring tension for lockup, they designed a portion of the liner to spring between the blade and the stop pin, wedging the blade open with compressive force. > > Keep your folders awesome. Despite its distinctive benefits, Spyderco’s proprietary Compression Lock is used sparingly within the company’s product line up. Spyderco Knives Compression Lock Folders-choose from Spyderco Junior made in collaboration with DiaLex, the Para-Military Knife Series and more. Necessity is the Mother of Invention The knife has been produced in countless variations over the years. This is a tough knife, built for hard use, with a 3.4 inch blade made from CPM-S30V steel. “When we designed the compression lock we had plans for purchasing another lock from somebody else, but at the last minute they decided that they didn’t want to sell their idea,” said Glesser. The Compression Lock first appeared in 2001 on the Gunting, a knife designed by martial arts hall of famer Bram Frank specifically for defensive tactics and close quarter combat. One of Spyderco’s most heralded EDC folders is the Paramilitary 2. But that all may be about to change as Spyderco puts a greater emphasis on its Compression Lock than ever before. Like it is for so many other great ideas, for the Compression Lock necessity was the mother of its invention and according to Glesser strength was the main requirement. We counted 24 Back Locks, 22 Liner Locks, and 17 Frame Locks on folders in Spyderco’s 2016 Catalog. “We are using the compression lock more now because we’ve got it dialed in and we’ve been able to show a couple of our vendors how to make it, so we will be using it more and more in the future,” Spyderco Founder Sal Glesser told us. AXIS Lock example: Benchmade Mini-Griptilian ($102) Slip Joint & Friction Folder Just to be clear, these types of blades don’t have a true “lock” as far … In contrast, only 3 Spyderco models you could buy today feature the Compression Lock: the Paramilitary 2, Yojimbo 2, and the Szabo folder. The Wolfspyder, a knife that is already available for pre-order and is sold exclusively by Ray Mears, will be the next new knife to ship with the lock. Pro-Tech recently put out the first new batch of the Harkins ATAC dual action autos in years. And that’s because it takes a tried-and-true concept and transforms it into one of the most secure mechanisms we’ve ever seen. Originally intended as a specialty knife shop... James Brand is joining many of its peers in the enthusiast production knife realm and releasing a piece of kitchen cutlery. The following lock types are ideal for one-handed operation: AXIS Lock, Compression Lock, Frame Lock. 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