Usage Tips:High Quality: Lawn mower blade sharpener made of materials, strong and , quality item which will last long. Easy to Use: It only takes 10s to install it. 1/4inch shank fits any power drill and hand drill. You only need to install it on your electric drill to use it. Lawnmower blade sharpener for drill can quickly make blunt old blades . Effectively provide your productivity. Saves time and effort. Lawn Mower Blade Balancer: The blade balancer is compatible with model 42-100. According to different diameter cutter, you can choose different diameter steps on the cutter holder for balance test. Widely Application: Mower blade sharpener widely used for sharpening lawn blade, lawn , mower, rototillers, garden scissors, drill blade, sickle bar cutter, etc. Colour:As Shown Material:Grinding wheel Package Contents: 2 * sanding heads 2 * whetstones 1 * blade balancer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.