Martin M10032S SAE Retaining Ring With Resin Crush Gauge, 3/4 in Drive, For Use With 67 Adaptor, 6107 Extension, 6110 Extension, 6113 Extension, 6140A Universal Joint, 6620-6634 Power/Impact Socket, 16624-16634 Power/Impact Socket, Alloy Steel

The original retainer ring was introduced to prevent serious injuries caused by flying or slipping steel pins used with the old two-piece socket retention system for large impact wrenches. The retainer ring is the solution for safer retention of impact sockets which can rotate at speeds up to 5000 rpm. The retainer ring new resin pin with crush gauge is designed to index in the retention holes on the tool anvil and socket at the correct location to maximize safe retention of power sockets.