[Drill Bit Grinder makes the re-sharpening drill bit easier - Purros Machinery Co.,Ltd. Purros Machinery is the largest manufacturer and supplier of drill bit grinders, also offers the drill bit grinding services. We have a wide range of equipment to support metal and machine industries from drill grinding machines to screw tap bit grinders, chamfering cutter grinders, and various types of universal tool grinders etc. We focus on reducing the difficulty of grinding and improve work efficiency, and makes the re-sharpening job easier!]