describe High Quality Material- Self-centering punches made of high-speed steel, impact resistance, wear resistance, rust resistance, and prolong service life. UNIQUE DESIGN- The self-centering surface of the spring-loaded pen pressure pin provides comfortable work and reduces user fatigue, while the precisely centered tip increases control over precise hole positioning. Easy to use- Use the heavy head to align the positioning point. Firmly grasp the handle and push it in the direction of the punch, the strong spring will force the punch out. No need for tools such as hammer, easy to carry. Non-Slip Design- Deep diamond knurled finger grip, easy to operate and better control, more secure; comfortable, non-pinch hood can well cushion your palm to resist spring shock. Multipurpose- Suitable for multiple tasks, such as: B. Marking materials, automatic emergency tools, alternating hammer and iron plate positioning, wood positioning, wall positioning, etc.