Brown corundum material: The lawn mower sharpener is made of high quality brown corundum. Sturdy and durable, easy to connect with drill bits and sharpeners. At the same time, the sharpened part is quite rough, and the blade can be sharpened easily and quickly. Save time and energy and enjoy a long service life. Easy to install: Installation only takes 10 seconds. You only need to install a sharpener on the electric drill to use it. The docking type electric drill and the portable electric drill can be used at the same time, and the blade can be sharpened easily and quickly. Effective and practical: it is a very useful tool in daily life . This structure is suitable for most electric drills and has an ideal balance of rotation, which is both convenient and practical. It can be easily connected with drill bits and sharp tools for long-term use and good value for money. Save time and effort: The sharpened area is very rough and the blade may can be sharpened quickly and easily. It saves time and energy, and is a good helper for a long time. It can be used for a long time and is not easily damaged. Wide range of applications: widely used for sharpening knives, drills, lawn mowers, sickle mowers, rotary cutters, etc.Easy to use: the sharpening part is quite rough, which makes it easy to quickly sharpen the blade, reduce the time and waiting time. Size: Stem diameter 6.35mm Color: Red + Orange + Green + Blue + Black Quantity: 5 pieces