Features: The spring structure inside the center punch can provide a strong impact force to complete the work of punching steel plates, wood plates, broken windows, etc.non- shell manufactured by finishing is durable.After pressing hard, the impact is triggered accurately, and with the impact tip, it is easy to locate and break the glass on the high-hardness metal.describe:Name: Automatic Center Punching LocatorUsage: Align the positioning point with a heavy head, firmly hold the handle and press it towards the direction of the punch. After the punch is pressed back into the rod for a short period, a strong spring will vigorously eject the punch, creating a pit for the dots, without the need to cooperate with tools such as a hammer, which is simple and easy to use.size: 128mmMaterial: steelcolour: silver+blackPackage Contents:1 x Automatic center punch positionerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.