Abstract: A knife is provided that has at least one scale with multiple layers. A user can remove these layers to achieve the proper knife handle thickness. Further, the user may add various top layers to accommodate different applications of the knife. These features improve the utility of the knife and lower the cost for the user because the user does not have to buy multiple knives with different handle sizes and different handle types.

Abstract: A knife is provided that has at least one scale with multiple layers. A user can remove these layers to achieve the proper knife handle thickness. Further, the user may add various top layers to accommodate different applications of the knife. These features improve the utility of the knife and lower the cost for the user because the user does not have to buy multiple knives with different handle sizes and different handle types.

Abstract: A folding knife is disclosed having a unique locking mechanism which prevents the blade from being closed when the knife is in use. The locking mechanism provides a rolling lock carried by the knife mechanism having a lever that is movable between two positions. In an unlocked position, the blade may be rotated between the extended and closed positions. With the lever in the locked position, the blade is held in the extended position. The blade provides a base having a cam surface and a notch in that surface. The rolling lock provides a cylindrical body having a notch. When the rolling lock lever is in the unlocked position and the blade is extended, the notch in the cylindrical body of the rolling lock occupies the same space as the notch in the cam surface of the blade, allowing the cam surface of the base of the blade to rotate through the notch in the rolling lock.