Product size: The total length is close to 130mm, and the diameter of the hat with a hat is about 28mm. High-quality material- Self-centering punch made of high-speed steel, which is strong impact resistant, wear-resistant and rust-resistant, and extends the service life. Unique Design- The self-centering surface of the spring-loaded pen pressure pin provides comfortable working and reduces user fatigue, while the precision-centered tip increases control over exact hole positioning. Ease of Use- Use the heavy head to align the positioning point. Firmly grasp the handle and push firmly towards the punch, the strong spring will forcefully eject the punch. No tools like hammers required, convenient and easy to carry. Non-Slip Design- Deep diamond knurled finger grip for easy handling and better control, more safety; The comfortable, non-pinching hood is a good cushion for your palm against spring bumps. Multipurpose- Suitable for a variety of tasks, such as: Marking materials, automatic emergency tools, alternate hammer and iron plate positioning, wood positioning, wall positioning, etc.