Product name: Industrial Automatic Center Punch Case material: Pure copper Product length: 13.2 cm Striker material: Steel 60 chrome vanadium Spring material: Solid steel Product features: Uses the spring in the body to generate impact force for drilling. Delivery quantity: 1 piece Color: Yellow Features: Knurled steel body with aluminum alloy tip. Gold color. Length: 132 mm. Precise and easy to use. Knurled handle provides a secure grip. Creates accurate starting points on steel and other solid materials. Ideal for making centering marks before drilling. Adjustable spring mechanism allows control of impact force based on material—enables precise and effortless marking without a hammer. Spring pressure can be adjusted by rotating the knurled upper section. Automatic and precise performance suitable for use on steel, wood, and plastic. Package contents: 1 x Automatic center punch