Usage Tips:Description: The lawn mower blades sharpener are designed with prefect spinning balance. This blade sharpener features quality grinding stone, strong and sturdy enough to make your mower get a clean edge and sharp again. You can choose the applicable layer of the blade balancer according to the blade in different calibre and with this balancer, it is easy for you to sharpen the blade quickly and 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 universal for electric lawn mower 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.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Blade Sharpener 1 x Blade Balancer