Known as the Snyder-Enfield gun appendage, this is a fine quality tool containing a steel screwdriver for large and small screws, firing pins, nipple wrench, main spring vice and configured with an oil holder in the handle, with thumbscrew and stopper. In all, five tools in one. This was a most ingenious device known as the "Sergeant's tool" and is in excellent, non-dug condition. This one is particularly desirable as it is an early one with a .69 caliber �worm� See Bannerman's p. 80