Specification：Material: brown fused aluminaDimensions: 55 x 50 mmFeature：1. Material: made of brown fused alumina material, which is durable, long service life; the blade can be used repeatedly2. Universal size: 55 x 50 mm / 2.16 x 1.97 inch each; small enough to fit in a cramped space and strong enough to sharpen your blade; 1/4 inch shank fits for any electric drill3. Effectively sharpen the knives/blade: a lawn mower blade sharpener can be simply attached to a drill to sharpen the blade easily and quickly without gouge marks or unevenness in order to save time and effort4. Mower blade balancer: 60 x 50 mm / 2.36 x 1.97 inch; quickly test the balance of the lawn mower; according to different diameters of the tool, the step of different diameters can be selected on the tool for balance test5. Widely used: for grinding lawn blades, lawn tractors, drill blades, lawn mowers, sickles, hoes, etcParts List:1 x Lawn mower blade sharpenerNotes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item2. Please allow slight dimension difference due to different manual measurement. Thank you for your understanding