GP15017 Diamond Hand Sanding Pads for Sanding, Grinding, Polishing and Sharp Edges / for Glass, Stone, Marble, Concrete / A+ Class / BUNDLE 4 PADS Pad Size: 3.7 x 2.1 inch / Thickness 1.1 inch 4 GRITS : 60 (Coarse), 120 (Medium), 200 (Semi-Fine), 400 (Fine) For hand Sanding, Grinding and Polishing cut edges of hard surfaces, Can be used for Glass, Marble, Stone, Tiles, Concrete Durability and Long Lasting