【High Quality Material】The body of the Spring Automatic Punch is made of carbon steel and the inner spring is made of stainless steel, which is waterproof and rustproof, high strength and durable. 【Fast】The Spring Center Punch uses the internal spring to generate the impact force to open the hole of the object. There is no need to hit with a hammer and it is easy to use. 【Adjustable】The automatic impact punch with adjustable impact force has a built-in spring to adjust the tension. You can adjust the cap clockwise or counterclockwise to make it perfect and hold well. 【Scope of Application】The automatic center punch can be used as a manual punching tool for wood, soft metal, glass; It can also be used to break car windows, allowing you to escape in an emergency. 【Specification】The automatic punch is 128mm long and 11mm in diameter. The set includes two automatic punches and two spare punches. Small, easy to carry