Product Review

This 3M Bumpon polyurethane material allows a smoother grind and a refined polish when used with any finer grade abrasive, such as Trizact or diamond. Mounted between the backpad and the abrasive, it gives the abrasive some extra space to fall into and brings vibration to a strict minimum while working. The ninja cushion is ideal for working on rounded or domed objects and is equally useful for flat surfaces.