1.Cerium Oxide is the best polishing to glass scratch because the chemical and reaction. 2.Easy to use,just mix with water and apply to the glass surface with the polishing felt to lightly scratched windows, , tabletops, windshields,glass , shower screens, windscreens, fish tanks, even car headlights to like-new condition. Product description Name: 8pcs Polishing Kit Pad Max RPM:12000 Suggested Instructions for Use of Cerium Oxide: (1)Supplies Needed: 1.Cerium Oxide 2.Water (Some recommend distilled water) 3.Polishing Wheel 4.Electric Drill 5.Small Plastic Tubs (Pint or quart size) 6.Spray colour: white : felt Package Contents: 1 x 120g cerium oxide 1 x 2cm felt polishing wheel 1 x 3cm felt polishing wheel 1 x 3inch felt polishing wheel pad 1 x 8mm drill bit adapter 3 x 3inch diameter polishing pad Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.