Quick Change Surface Conditioning Scrim Black (SCSB) discs with R fastening system Recommended for use in applications requiring considerable mechanical strength Extremely quick to change Fast and heavy abrasive action with high unloading properties Compact design fits into hard-to-reach areas Type III fastener features a roll-on/roll-off style (equivalent to the 3M¿ Roloc¿ fastening style) For use with ATD-6602 3" disc holder Recommended Applications: plastic products, machinery for the chemical and food industries, stainless steel furniture, automotive, aircraft and aerospace industries and stainless steel metal fabricators Work Surfaces: Steel, stainless steel, aluminum, titanium and alloys, fiberglass, plastic and glass Max rpm: 25,000 Shipping Weight: 1.4 lbs.