3" Medium Grit Disc, 25 Pack 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). 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 3154 Yes - DI(2-ETHYLHEXYL)PHTHALATE (DEHP)