2-Piece Automatic Center Punch Set, Automatic Center Punch, Spring Tension Center Punches, Adjustable Impact Automatic Center Punch, for Wood, Wall, Metal, with 2 Replacement Points

【Material】Mark a starting point with metal studs (steel, aluminum, brass, copper), wood, glass, leather, or plastic to prevent drill bits or screws from slipping. 【Adjustable】The automatic center punch has a built-in spring for tension adjustment. You can adjust the cover clockwise or counterclockwise for a precise and secure fit. 【Versatile Application】The automatic center punch can be used as a manual punching tool on wood, soft metal, and glass; it can also be used to break car windows for emergency escape. in case of emergency 【Easy to Use】: Simple one-handed operation without a hammer. Anyone who only has one hand free to strike won't want to be without this tool. You'll find that self-punching awls are a great addition to any home toolkit.