Quantity: 4 pieces The color red Specifications: single weight about 70g, shank diameter 6.35mm. Application: effective tool for sharpen lawn blades, drill blades, lawnmowers, cutting scythes, rotary tillers, hoes, etc. No need to disassemble the blade, it can simply be attached to strength exercises. Blades can be sharpened easily and quickly, reducing time and waiting, saving you time and effort. Quality: Made of corundum, strong and durable, can be used for a long time, not easy to break, very heavy, so please use it carefully. Function: Features an edge on the lawn mower blades to maintain the original sharpness, helps remove nicked blades from rocks and sticks. Benefits: The sharpener features high quality grinding wheels that are durable enough to give your lawn mower a clean, sharp edge.