Description: 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. Specifications: 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. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Material: ABS+ corundum grinding wheel colour: A-Blue Package Contents: 3 x Drill sharpener set Only the above package content, other products are not included. Note: Light reflection 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.