This is an authentic replacement part manufactured for use with rotary hammers and demolition hammers. The special roller is used to reduce friction between the spindle and the casting. This roller is available as an individual replacement part, please note two rollers are required.
This is an authentic manufacturer sourced replacement part that is specially designed for use with Dewalt hammers. It helps to create an air tight seal for the piston and the cylinder. Over time seals and o-ring may deteriorate and crack eventually requiring replacement to maintain peak performance. It is made from high quality rubber and it is sold individually.