High-quality materials: The drill bit is made of high-quality ABS plastic and brown corundum grinding wheel, high hardness, rust-proof, wear-resistant, strong and durable. Easy to use: The product is easy to use, very practical, and very suitable for fast drilling. Easy to carry: Lightweight and portable practical tool, easy to carry. Practical and efficient: Use this sharpener with your drill to keep the drill sharp, improve the utilization of the drill, and save energy and money. Purpose: The grinding wheel of this product is a brown corundum grinding wheel, which is mainly used for grinding iron drill bits. Other high hardness drill bits can be exempted. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.