This is a manufacturer sourced replacement part designed for use with Chicago Pneumatic ratchet/wrenchs. This o-ring provides an air-tight seal for the valve. Over time this o-ring will shrink, become brittle and crack allowing for air leaks. At that time it should be replaced. It is made out of rubber and it is sold individually. Replac...Read moreing this item you would need hex key/allen wrench and pliers to replace this item.
This is an authentic OEM part used in Chicago Pneumatic tools. The seat-throttle is made from hard rubber and is used in multiple tools. It is designed to absorb shock and fits between the valve throttle and the o-ring. An Allen wrench and a hammer may be required to install the throttle. This part is sold individually.