High Quality Material The Shell Of The Spring Center Punch Is Made Of High Carbon Steel, The Inner Spring Is Made Of Stainless Steel, Waterproof And Rustproof, High Strength, Not Easy To Break, DurableUnique Design The Spring-Loaded Nailing Shank'S Non-Slip Surface Provides Comfortable Working And Reduces User Fatigue, While The Precision-Centered Tip Increases Machining And Control For More Precisely Placed Holes. AdjustableAutomatic Center Punch With Built-In Spring To Adjust Tension For Light And Heavy Lifting, Marking, Drilling And Stacking. You Can Adjust The Cap Clockwise Or Counter-Clockwise To Get It Just Right And Hold It TightEasy To UsePress The Handle Hard, Push- The Towards The Pad To Align It With The Positioning Point, The Strong Spring Will Pop The Pad With Force. No Need For Tools Like Hammers, One-Handed Operation, Easy To UseWide UseThe Center Punch Tool Is A Safety Tool In The Car. The Car Windows Can Be Easily Smashed, Allowing You To Escape In An Emergency. Can Also Be Used To Mark, Punch, Perforate And Scribe Surfaces Such As Wood, Metal, Glass, Plastic, Leather, Cardboard Or Walls-4