Durable Material: Made of high-quality plastic, High hardness, rustproof, solid and durable,self-centering point, do not need assistant center drilling or center punching. Application: The grinding drill tool is portable and easy to use, suitable for grinding 2mm-5mm (5/64 inch -13/64 inch), 5mm-8mm (7/32 inch -21/64 inch), 8mm-12.5mm (11/32 inch -1/2 inch) straight drill bits. Reliable and Efficient: Compact and portable drill grinding tool. Use this drill bit sharpening tool with your power drill to keep bits sharp and ready for use. Give your old blunt drill bits a second life and improve the utilization of drill bits, save time and save money. Warm Tips: The grinding wheel is brown corundum grinding wheel, so the product is mainly used for grinding iron-type drill bits. Other high-hardness drill bits are not suitable for use, the loss will be relatively large. Material:plastic colour:Orange+Blue Package Contents: 2 * Corundum Drill Bit Sharpener 4 * Brown Corundum Grinding Wheel Replacement 4 * Wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.