GP12001 Hook and Loop Backing Pad, Spindle Pad for Drill / M6 Thread plus Drill attachment / Diameter 2 inch Pad Diameter: 2 inch / 50mm Thread Size M6 (comes with universal drill attachment) Density Medium Semi-Flexi 10mm PUR Interface: Hook and Loop fastener (Velcro type), Max RPM 4500 Recommended for Spot repairs, high speed sanding or polishing, flat delicate surfaces (Glass, Plastic, Acrylic, Stainless Steel)