This door knob has been accurately cut on a CNC machine to tight tolerances so as to exactly duplicate an actual revolver cylinder. Once-fired .357 Brass cartridges (inert) are used for an authentic look. This patent Pending design will make a handsome addition to any shooting enthusiasts home. The door knob mechanism is for a passage door or closet door (non-locking) and will fit most any door. The kit comes complete with the original door knob kit modified to accept the door knob adapter and .357 cylinder door knob plus assembly instructions. An Allen Wrench is supplied to tighten the two set screws on the door knob adapter to the door knob shaft.