New Tenax automated edge polishing wheels are excellent on all materials including quartz, granite, marble, porcelain and ceramic. They can be used for either a straight edge or a bullnose edge. Designed with colored holders for easy ID, they are available in grits 60, 120, 220, 400, 600, 800, 1200, 1500, 2000, 3000, and 5000. 5″ or 6″ sizes available with a universal snail lock and hexagon attachment which make them easy to change. These Tenax automated edge polishing wheels will not bleed onto white quartz and provide an excellent polish for a great price. Expect an easy break-in period, long life and a great polish from beginning to end.