Grinding wheel currently used in the product is a brown corundum grinding wheel, so the product is mainly used for grinding iron drills. Other high hardness drills are not suitable for use, and the loss will be relatively large. Product Specification: Color: blue/orange Material: ABS + corundum grinding wheel Grinding wheel material: brown corundum grinding wheel Handle material: ABS Product size: 170*85mm(The size is shown in the picture) Product Features: 1. Use electric drill with mandrel to drive this tool. 2.Sharpen bits and improve your work performance. 3. Grinding wheel made of wear resistant corundum. 4. Good sharpening effect, saving a lot of effort. 5. Light weight and compact size, easy to load. 6. Applicable drill size: 5/64'' - 13/64'' (2mm-5mm) 7/32'' - 21/64'' (5mm-8mm) + 11/32''-1/2'' (8mm-12.5mm), angle And width can be adjusted. the angle and width can be adjusted. 7. The best choice for novices and handymen 8. After use, place in a dry and clean place. 9. Do not use with harsh chemicals, it might reduce the lifetimes. Drill bit grinding drill--product operation: 1. Install the grinder on the electric drill and lock the chuck 2. Hold the electric drill in one hand and the grinder in the other hand, use your thumb to gently push the drill bit 3. When working, the electric drill needs to rotate forward and the speed needs to be fast It is suitable for grinding 2.0-12.5mm drill bits to play the role of grinding and repairing. Package Includes: Option 1:1pc x blue Drill bit Sharpener Option 2: 1pc x orange Drill bit Sharpener Option 3: 1pc x blue Drill bit Sharpener+1pc x corundum grinding wheel Option 4: 1pc x orange Drill bit Sharpener+1pc x corundum grinding wheel Option 5: 1pcs x corundum grinding wheel Note: The Drill bit Sharpener product itself includes a corundum grinding wheel and a spanner (as shown in the option diagram, if you do not know what accessories are included, you can check the picture of the option diagram) Thank you! Note: Please allow 1-2mm error due to manual measurement. Thanks for your understanding. Monitors are not even calibers, the color of the item shown in photos may show slightly different from the actual item. Please take the real one as standard. After use, place the drill sharpener in a place that is out of reach of children to prevent sharp parts from harming children. We guarantee to provide the best quality products and best service, if any problems, you can contact us, we will provide a variety of solutions for you to choose. _x000D_