Specifications: This automatic center punch is 13cm in length and 1.2cm in diameter, the set includes two automatic center punches and two spare center punches, the appearance is small and easy to carry. High Quality Material: The needle shell is made of high carbon steel and the inner spring is made of stainless steel, which is waterproof and rustproof, high strength and durable. Quick: The self-centering punch uses the internal spring to generate the impact force to open the hole of the object, no need to use a hammer to knock, and the operation is simple . Adjustable: The automatic needle valve has a built-in tension adjustment spring, and the lid can be adjusted clockwise or counterclockwise a watch to make it perfect. WIDE APPLICATIONS: Spring-loaded automatic center punch can be used as a manual punch tool on wood, metal, and glass; it can also be used to break car windows during emergency evacuations. Product Description Features: Stainless steel, high strength, not easy to break, durable. The diamond-shaped pattern on the surface increases the friction between the hand and the handle, and the anti-slip effect is good. A high-strength spring can adjust the effect of the product. Compact appearance, easy to carry. In an emergency, you can easily break the window to escape. Can be used on wood, metal or glass. Specifications: Size: Length 13cm, Diameter 1.1cm Packing List: 2 x Auto Hole Punches< /p> 2 spare nibs Hint: 1. The relevant dimensions of the product are all measured by hand, there may be slight errors, please understand. 2. Due to shooting equipment and light, the product may have a slight color difference.