The ALM Manufacturing GP288 Rotary Lawnmower Blade Sharpener are designed to re-sharpen the metal blade on most hover or rotary lawnmowers and can be easily fitted to an electric drill.They sharpen the blade and give an ideal cutting angle. The GP288 are easy to use and are double sided to last a long time and can also be used to sharpen other tools, including garden shears. Ref: UTTK9206