Feature: 100% brand new and high quality Great for noble metal, ceramics, resin and so on Conducting smooth precise high-quality processing Long life - durability is increased over 10 times longer than high-speed steel cutting tools and over 200 times longer than wheels Safe, reliable and easy to use Total processing cost could be lowered down several times Color: White/ Blue/Yellow/Black/Pink/Green White is coarse for smoothing porcelain or caramics Pink is medium for first-step polishing porcelain and alloy Blue is fine for polishing porcelain,precious metal and jewellery Black is coarse for adjusting cobalt-chromium alloy and hard metal Green is medium for first-step polishing of acrylic Brown is medium for fasting smoothing metal or acrylic Yellow is fine for olishing acrylic or jewellery Package: 10 Piece