Dual action backing pads Dual Action backing padsThe Urethane molding technics makes the permanent bond for the components of the pad and eliminates ungluing problems.The microcelluar Urethane foam has the good rebound performance and can absorb the vibration. It does not deformpermanently, and is extremely tough and durable to withstand the rigorous operation of up to 15000RPM.One-piece 5/16”-24 ...