【Durable Material】This hole punch tool is made of high-quality bearing steel, ensuring durability and longevity. 【High Precision】Punches holes cleanly and accurately, ideal for creating precise holes. 【Efficient】The thoughtful design ensures even pressure during cutting, producing clean holes with minimal burring that require no additional finishing. 【Easy to Use】Manual knockout punch with a simple drive design that uses a wrench to apply pressure through several turns. 【Wide Application】Hole knockout die and punch set is suitable for cutting sheet steel, copper, aluminum, brass, and similar materials. Specification: Material: Bearing Steel Size Chart: 20mm / 0.79 inch, 22mm / 0.87 inch, 25mm / 0.98 inch Package Includes: 1 x Sheet Metal Punch Hole Punch Note: Please allow slight variations due to manual measurement and differences in display monitors.