The grinding wheel currently used in this product is brown corundum grinding wheel, so this product is mainly used for grinding iron drills. Other high hardness drill bits are not suitable for use, and the loss will be relatively large. Product Features:Use a power drill with an arbor to drive this tool. Sharpen drill bits and improve your work performance. Wear-resistant brown corundum grinding wheel. The sharpening effect is good and labor-saving. Lightweight, compact and easy to load. Product Specifications:Color: Blue/OrangeMaterial: ABS+brown corundum grinding wheelGrinding wheel material: Brown corundum grinding wheelHandle Material: ABSPackage includes:1 x Twist Drill Grinder1 wrench1 anti-trip