High-end materials: The hardness of the lug reaches 58 -65. Compared to the conventional center punch, the spring-loaded center punch does not require a hammer to strike, but uses the internal spring to generate impact for more comfortable and durable positioning. Design: The bag body has a finger grip for easy handling and better control; the comfortable cup is a good padding for your palm against the effects of springs. Adjustable Shock Resistance: Adjustable shock resistance, spring tension adjusts for light or heavy impact, marking, punching and staking. Application method: choose a suitable size punch, the punch is 90 degrees perpendicular to the leather surface, press the handle to the required position and use pressure of the handle to rotate the threaded groove at the connecting rod counterclockwise to drive the punch to rotate to cut round holes. Versatile: The automatic center punch is suitable for a variety of tasks, such as marking on materials, automatic emergency tools, alternate positioning of hammer and iron plate, wood positioning, wall positioning, etc. Note: The data are all measurements Manual, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received.