Patented by Spyderco, the Manix II has a Ball Bearing Lock. It's a hardened free-floating ball bearing contained in a custom hi-tech polymer cage. The round ball bearing allows the lock to self adjust across a large surface, smoothly and consistently locking-up with solid confidence. Evolving over time, the Ball Bearing Lock's strength withstands hard work with a secure, versatile and comfortable grip. Ergonomics are peerless in this design. The blade is 154CM and hollow-ground with aggressive thumb serrations (jimping) above a super sized 14mm Spyderco Round Hole. The Jimping doesn't stop there. With full steel liners the scales have jimping that extends beyond the G-10 handle scales scalloping areas of the handle's perimeter. This one is not slipping out of your hand and works well with gloves on! The liners pull double purpose by adding rigidly and lightweight strength to the handle. A three-screw clip is left/right-hand carry, positioned for comfort and deep pocket carry. The knife also has a large lanyard hole to protect various types of cords or thongs. 154CM stainless steel blade 9/16" diameter thumb hole Ball Bearing Lock Black G-10 handle Removable reversible pocket clip Lanyard hole 3-3/8" blade 4-5/8" closed Made in the U.S.A.