This is a very impressive Chameleon II from Butch. The premium black rayskin inlay is interspersed with white nodes, with the auto release button hidden under the inlay - to fire, depress the inlay just below the third large node in the forward 1/4 of the inlay. Whether opened manually or automatically, closure is via the linerlock which has an oversized thumb depression, making closure quite easy. File notches on the tang spine afford a good thumb rest and the index finger groove assures a firm grip. Stamped #29 with a chameleon and II on the pile side of the blade. This is a great knife.