Bill Harsey Designed: Ruger CRKT All-Cylinders Folding knife with locking liner and thumb stud - featuring a black, stonewashed 4.0"10.16 cm drop-point blade; machined G10 handle; unique, "revolver cylinder-style" pivot point; and 2-position clip. Made from 8Cr13MoV Hardness 58-59 HRC Steel. Available in plain or serrated blade.