This is a spring assisted knife, meaning when you push on the thumb stud to open it a spring takes over and propels the blade open (you can also activate the knife by pressing a flipper on the spine when the blade is closed). The blade on this knife is nice quality black stainless steel. The body of the Xcaliber is made out of black finished steel and features a blackwood insert on both the front and back of the knife with steel liners. A pocket clip (tip up) ensures easy carry and access. The overall fit of the knife body is quite good as are the the action and lock-up. The knife comes in three sizes. This is the small version.