The central punch is simple and precise to use. Automatic design hits steel wood and plastic cleanly and accurately. Features: Simple and precise to use knurled handle prevents slipping. Gives an accurate starting point on steel and other solid materials. Allows you to easily mark the work using one hand before drilling, which will prevent the drill from slipping. The automatic spring loads then release at the start of the cycle with force to create a central punch (no hammer required). The spring pressure can be adjusted by simply rotating the knurled top of the punch. Features: Material: Knurled steel body, alloy steel tip Color: Yellow, Black (optional) Item Size: 130 * 5 * 5mm / 5.12 * 0.2 * 0.2in Item Weight: 60g / 2.12ounces Package List: 1 * Automatic Center Punch