Marking tool - usually used to mark the center of a point, with small pits guiding the tip of the drill bit to avoid sliding or deviation that may cause damage. High speed steel material - The tip of this automatic center punch is made of high speed steel, which has high strength and durability. Size - The total length is close to 130mm, and the diameter of the hat with a hat is approximately 28mm.< /p> Suitable materials - Automatic punching machines are suitable for punching and positioning on materials such as steel plates, aluminum, copper, and wooden boards. Easy to operate - no hammer required, with this automatic centering tool, you can quickly and easily form dents on the workpiece. Application - The center punch is also a great tool that can be placed in the car and used to break WIN in emergency situations.