FEATURES: [1] The center punch is made of chrome vanadium steel, sturdy punch body can withstand strong impact force and resist corrosion. [2] Ergonomic palm handle is comfortable in shape and easy to the lever when making a hole, knurling mechanism, convenient, no sliding grip. [3] Impact strengh adjustble, spring tension adjusts for light or heavy strokes, marking, punching and staking. 5.1" long with antiskid thread convenient for hold.Best partner for your job. [4] Suitable for a variety of tasks, such as a mark on materials, such as wood, plastic, metal, glass, leather, wall surface, car emergency tools, preventing the screw and bit from wandering. [5] Easily adjust the lid to change the impact, automatic center punch has one-handed impact operation, no hammer needed. Small in size, very portable, you can even put it directly into your pocket. SPEIFICATION: Type: Automatic Center Punch Material: Chrome Vanadium Steel Length: 130mm / 5.1 " Use: Metal Drilling DIY Color: Silver + Red PACKAGE INCLUDES: 1* Center Hole Punch EASY TO USE 1. Determine the exact location of the hole be drilled. 2. Use the sharp end of the center punch to align the correct position. 3. Press down, when hearing a bang, you got an accurate registration point. 4. Place the drill bit on the marked spot and begin drilling. Notes: 1. Size for manual measurement, there may be a 1 to 3 mm error, belongs to the normal phenomenon. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!