Characteristic: 1. Efficient file: The complete and even particle distribution allows for stable and effective sharpening of these files. 2. Practical application: mainly used do grinding, mold processing and repair, engraving, line cutting, welding drill, etc. 3. Wide application: allows flexible use on 7/32 inch wheels and large chainsaw chains such as 404 chain, 3/8 inch. 4. Easy Replacement: Specially designed do electric grinder, only 2 steps are needed do complete the replacement, very easy. 5. Durable use: By using emery material in the electroplating process, Ti grinding heads have excellent durability. 6. Beveling and machining of grooves of various mechanical parts, cleaning of pipes, holes and parts do surface treatment. 7. It can be installed on electric grinders, do engraving tools and pneumatic engraving pens. . 20 PCS FILE DO SHARPENING CHAIN SAW ROUND . 20 PCS FILE DO SHARPENING CHAIN SAW ROUND Specification: Item Type: do Chainsaw Sharpening Material: Emerald Function: Grinding head do chain grinder. 20 PCS FILE DO SHARPENING CHAIN SAW ROUND . 20 PCS FILE DO SHARPENING CHAIN SAW ROUND List of packages: 20 x do sharpening chainsaws. 20 PCS FILE DO SHARPENING CHAIN SAW ROUND . 20 PCS FILE DO SHARPENING CHAIN SAW ROUND . 20 PCS FILE DO SHARPENING CHAIN SAW ROUND . 20 PCS FILE DO SHARPENING CHAIN SAW ROUND