Specifications:This automatic center punch is 13 cm long and 1.1 cm in diameter. The set includes two automatic center punches and two spare punches. The appearance is small and easy to carry.High quality material: The needle shell is made of high carbon steel and the built-in 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 article hole, without the use of a hammer to strike, and the operation is simple.Adjustable: The automatic needle valve has a built-in tension adjustment spring, and the cover can be adjusted clockwise or counterclockwise to make it perfect.Wide application :The spring-loaded automatic center punches can be used as a manual punching tool on wood, metal and glass; it can also be used to break car windows to escape in an emergency.Features:Made of high carbon steel and stainless steel, high strength and not easy to break, durable.Diamond pattern on the surface increases the friction between the hand and the handle, and the non-slip effect is good.High-strength spring can adjust the effect of the product.Compact appearance, easy to carry .In an emergency, you can easily break the car windows to escape.Can be used on wood, metal or glass. Specifications:Material: High carbon steel, stainless steel.Size: 13 cm long, 1.1 cm in diameter< p>Packing List:2 x Auto Punch2 x Spare TipsTip:1.The relevant dimensions of the product are manually measured, there may be slight errors, please understand.2.Due to the shooting equipment and the light, the product may have slight chromatic aberration.lucky meetNote: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain difference in color, the actual object received shall prevail.