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

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【Material】Mark a starting point with metal (steel, aluminum, brass, copper), wood, glass, leather, or plastic studs to prevent drills 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 perfect fit. 【Wild Applications】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 to allow you to escape in an 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 punches are a great addition to your household toolkit. 【Specifications】The metal grain measures 128mm (5.04 inches) in length and 11mm (0.49 inches) in diameter. The set contains two automatic center punches and two replacement punches. The external shape is compact and easy to carry.