To prevent drills and screws from wandering in metal, wood, or plastic, use the Automatic Center Punch to mark a dimpled starting point. Quick and easy to use, it delivers an automatic spring-driven strike when it's pressed against a surface. An adjustable allows you to regulate the striking force. The premium HSS body has a deeply knurled nonslip surface for sure handling and control. Features - Color: As shown - Size: 13x3x3cm - Material: HSS and copper - The force of the center punch can be adjusted through the cap, no need to use hammers. - The HSS Body, can be as high as HRC58 ~65, diamond pattern deeply ridged handle it shouldn't slip. - One-handed spring-loaded impact operation, no hammer required. - Automatic center punch will mark, scribe, punch start drill, nail or screw holes. - Can be used for vehicle emergencies as a side window glass breaking tool.