... knife polishing wheels Polishing hard alloy and other tools; Durable,wide range,less heat, OEM is ok. Diamond dish-shaped ... CO.,LTD is a professional factory mainly manufacturing Diamond/CBN Grinding Wheels, Gun Drills, Diamond Oilstone, Grinding Paste, and Grinding File. ... than 10 years experience in producing Grinding Cutting Wheels,Gun Drills, Diamond Oilstone, Grinding Paste and Grinding File. We ...