Our largest and toughest center punch is the professional's choice for marking and punching the toughest metals. One-handed operation for precision marks without a hammer. Impact force can be adjusted to work with lighter materials. Includes reloadable steel threaded tip. Body diameter: 5 inches. Can be used for vehicle emergencies as a side window rescue tool. Description: Features: Top quality product. Material: Knurled steel body + alloy steel tip. Color: Golden, as the picture. Hardness: HRC58-65. Diameter: about 12.7mm. Length : approximately 130 mm. Simple and precise to use. Knurled handle to prevent slipping. Gives a precise starting point on steel and other strong materials. Allows you to easily mark the work with one hand before drilling, which will prevent the drill from slipping. The spring then releases at the top of the ring with force to create a center punch (no hammer needed). The spring pressure can be adjusted by simply turning the knurled top of the punch. Automatic design that cleanly and precisely pierces steel, wood and plastic. Package contents: 1 automatic center punch (the other accessories are not included).