High-quality material The spring-loaded auto punch housing is made of high carbon steel, and the inner spring is made of stainless steel, providing waterproof and rustproof performance with high strength and durability. Quick operation Spring center punches use the inner spring to generate impact force, allowing for easy hole marking without the need for a hammer. Simple and efficient to operate. Adjustable design The adjustable impact auto punch features a built-in spring mechanism for tension adjustment. Rotate the cap clockwise or counterclockwise to achieve optimal performance and consistent results. Applications The automatic center punch can be used as a manual marking tool on materials such as wood, soft metal, and glass. It may also be used to break car windows in emergency situations to assist with escape. Specifications The auto punch measures 128mm in length and 11mm in diameter. The set includes two automatic center punches and two replacement tips. Compact and portable design.