Features: Automatic Center Punches Knurled non-slip surface and precision centered tip increase control for more accurate and precise holes. 5” Center Punch for ideal for leaving sets at your home, garage, and tool box. These are the best Automatic Metal Center Punch. Each Center Punch is Chrome plated shank body withstands high impact force and resists corrosion; extremely strong carbon steel tip holds up to hard surfaces. Automatic Center Punch features adjustable impact strength, adjustable spring tension for light or heavy strokes, marking, punching, and staking. For a heavy mark, the cap is screwed down. Progressively lighter marks are obtained by turning the cap upward Marks made by the point are uniform in depth and size for each setting. Specifications: Material: Carbon Steel Size: 107x9x5mm/4.21x0.35x0.19 in Package Includes: 1x Automatic Center Punch note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.