This automatic center punch is a convenient and reliable tool that is perfect for creating precise and accurate holes in a variety of materials. It has a knurled brass barrel with a spring loaded steel alloy point, which allows for a secure grip and precise strikes. The punch is approximately 5 inches (125mm) in length, making it easy to handle and maneuver. The spring loaded design of the punch means that it automatically strikes a sharp blow when the point is pressed against the material, making it quick and easy to use. This automatic center punch is ideal for a wide range of tasks, including creating holes in metal, plastic, and other materials, as well as for marking and identifying locations on various surfaces. It is a must-have tool for any workshop or garage.