: This hole saw is made of high-quality M42 high-speed steel. It features sharp edges and high hardness, making it strong and durable. The tool resists oil and rust, ensuring long-term performance. Precision concentricity ensures uniform tooth edges, extending the life of the blade. The sharp tooth design reduces vibration and allows for quick balance during cutting, resulting in smooth and stable operation. Makes drilling easier.Chip removal hole design: The hole saw includes a spring-loaded design that enhances chip removal, improving the speed at which cylindrical chips are cleared from the hole. This helps prevent clogging and cracking, offering efficient and reliable performance.Easy to use: Featuring a sharp-edged design, this hole saw cuts smoothly and efficiently. The built-in drill spring automatically ejects the core after drilling, simplifying the process and saving time.Wide application: Suitable for use on plasterboard, aluminum, non-ferrous metals, copper, brass, wood, plastic, and PVC. Compatible with bench drills, magnetic drills, deep hole drills, and impact drills. A practical tool for various drilling needs.