ZFE 4" Inch 100Mm Round Polishing Wheel Wool Felt Polish Pad Pack Of 5Pcs 4" inch 100mm Round Polishing wheel Wool Felt polish pad Arbor hole: 5/8" (16mm) Angle Grinder diameter: 100mm(4inch) Thickness: 3/8 inch (10mm) Inside hole: 5/8 inch (16mm)