Packing content: You will receive 2 pieces automatic centre punch for metal, length is 130mm/5.11in, punch diameter is 4mm/0.15in. Material features: Adjustable tension center punch tools are made of metal, high hardness, wear resistance, rust proof and strong impact force. Unique design: Center punchers have built-in spring, using the impact force generated by the internal spring to mark points, preventing the drill bit from sliding. Easy to use: You don't need to use a hammer, just simply press down spring loaded centre punch to create a punch indentation. Wide application: Hole punch hand push tools are useful hole punch tool for wood, metal and glass. They can be used as emergency car window escape tools., Manufacturer: zylwandefa