SRK13012 Quick Change, Type R Backing Pad - 2" $11.97 Quantity discounts available QuantityPrice Quantity -+ Add to Cart Details Sturdy rubber backing pad works with any 3M or Type "R" twist-to-lock disc'sMetal insert with 1/4" mandrel for use in angle grinders and air d... Details Back DetailsSturdy rubber backing pad works with any 3M or Type "R" twist-to-lock disc'sMetal insert with 1/4" mandrel for use in angle grinders and air die grinders