ITEM NAME:Chain Grinder Accessories Grinding Stone Fast for Saw Chain Sharpening Tool A8F3 Chain Grinder Accessories Grinding Stone Fast for Saw Chain Sharpening Tool A8F3 Which gives the user the power supply to sharpen their chain, on the saw, in the workplace. Provide a fast, simple and portable chain saw sharpening method. The sharpening stone fits inside the bar-mounted to sharpen knives. Clamps beyond the end of the Guide Bar during sharpening. Easy to use. Instructions for Use: 1. open the tool chain adjustment. 2. remove black accessories and grinding wheels. 3. Install the grinding wheel fittings in black again, put it back into Grinding tool chain. size:6*1.7*1.3cm Material:Oil stone colour:Photo Color Package Contents: 6 * grinding stone