The lawn mower blade sharpener is designed with perfect spinning balance. This blade sharpener features a quality grinding stone, strong and sturdy enough to make your mower achieve a clean edge and sharpness again. You can choose the applicable layer of the blade balancer according to the blade in different calibers, and with this balancer, it is easy and compatible for you to sharpen the blade quickly, thus greatly reducing both the operating time and waiting time. It is made of grindstone material. There are various sizes of blade balancer and blade sharpener. It is universally compatible with electric lawn mowers. Item Name: Blade Sharpener Material: Stone Features: Universal, Solid, Sharp, Easy to Use Size Details: Blade Balancer Diameter Range: 9.5mm/0.37", 11mm/0.43", 12.5mm/0.49", 15.8mm/0.62", 19mm/0.74", 22.5mm/0.88", 25.5mm/1", 28.5mm/1.12", 31.5mm/1.24", 35mm/1.37" (Approx.) Blade Sharpener Size: 5.5cm x 5cm x 5cm / 2.16" x 1.96" x 1.96" (Approx.) Blade Balancer Size: 6cm x 6cm x 5cm / 2.36" x 2.36" x 1.96" (Approx.) Note: Due to light and screen setting differences, the item's color may be slightly different from the pictures. Please allow slight dimension differences due to manual measurement. Package Includes: 1 x Blade Sharpener 1 x Blade Balancer