uxcell Angle Grinder Sanding Polishing Hook and Loop Backing Pad 4" Dia Product Name : Hoop and Loop Backing Pad;Material : Plastic, Metal, Sponge Max Speed : 12000;Wheel Size : 100 x 40mm / 4" x 1.6" (D*T) Hole Thread Diameter : 8.5mm;Color : Yellow, Black Weight : 49g Package Content : 1 x Hoop and Loop Backing Pad