WUZHOU Practical: One-handed operation is easy without a hammer. Mark the starting point of the pit on the metal, wood, glass, leather or plastic surface to prevent the drill or screw from slipping off Spring design: Tension screw design, just turn the knob to adjust the best tension. The impact pressure of the double spring loaded barrel provides the correct indentation for the material you use Multi-function: Not only a center punch, but also a safety tool on the car. Can easily break the car windows to help you escape in any emergency Delivery Quantity: 2pcs, Package Contents: Only the above package contents, excluding other products. Size: length 128mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: silver (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)