The roll pin attaches to the handle and is made of metal. This is an OEM part sourced directly from the manufacturer and used in grinders, impact wrenches, ratchet wrenches, and sanders made by Chicago Pneumatic. This part is available as an individual replacement. It may require a set of pliers during installation and will require replacing if it becomes bent or broken.
This item is a genuine replacement part that is intended to be used with impact wrenches and air hammers. The steel ball fits into a slot on a part assembly and is used to reduce friction between the assembly and the housing. The ball is available as an individual replacement part.