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. EASY TO USE: 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.