1. These Compounds are color coded for easy identification in a scale from coarse to fine. You can easily choose the thickness that suits you according to the color. It can emit cold light after polishing, and the brightness reaches the mirror level. Contains high anti-rust ingredients to extend the anti-rust life of the product. , not easy to wear, help you save costs. 2. Used for drill with 1/4 inch shank. Our products come with a handle, so you don't need to buy it separately. Soak the grinding wheel in water for a while before use, which can increase the of the grinding products. After making sure the polishing wheel is firmly installed,start the machine. Start polishing machine at low speed and increase speed as you need. 3. It is suitable for the grinding and polishing of metal, jewellery, hardware, stainless steel, aluminum products, wood, plastic, ceramics, glass and watches. Equipped with four different hardness polishing wheels, you can choose according to the needs of the