Use this drill bit sharpening tool with your power drill to keep bits and ready for use. Made of plastic and brown corundum grinding wheel, high hardness, rustproof, solid and durable. Portable tools that you can carry around and don’t take up space in your backpack. Features - Color: Assorted Color. - Material: Brown corundum grinding wheel. - Size: 18.00X9.00X3.00cm/7.07X3.54X1.18in. - Compact and portable drill grinding tool, use this drill bit sharpening tool with your power drill to keep bits and ready for use. - Made of plastic and brown corundum grinding wheel, high hardness, rustproof, solid and durable. - It can grind iron drill bit very well, and it is durable and not easy to damage. - Portable tools that you can carry around and don’t take up space in your backpack. - It is manufactured with professional technology to ensure the of the product and can work for a long time. Package list: 4 sets x drill bit sharpeners