Lawn Mower Blade Sharpener: Total Length: 64mm/2.52in; Outer Diameter: 53mm/2.09in; Shank Diameter: 7mm/0.28in; Package Content: 1 x Lawn Mower Blade Sharpener Corundum and Plastic: The knife sharpener is made of durable corundum, which has good hardness and wear resistance. The plastic holder provides additional support and stability during the sharpening process. The blade balancer is made of sturdy plastic to ensure precise balancing. Double-layer design: The corundum sharpener adopts a double-layer design, which provides a more positive and efficient sharpening action, helping to quickly restore the sharpness of your lawnmower blade. Easy to use: First, attach the corundum sharpener to your electric drill or hand drill. The mower blade is then fixed in the clamp for stability. Finally, turn on the drill and gently press the sharpener against the edge of the blade, moving it along the blade to achieve a clean edge. Wide range of uses: These sharpeners are ideal for lawnmowers, garden tools, hand drills, sharpening lawnmower blades, drill blades, sickle mowers, tillers, and other cutting equipment.