The center punch tip is made of high speed steel that holds up to strong impact,wear resisting and rust proof to prolong the punch life,high speed steel hardness: HRC58 Degree ~ 60 Degree. Automatic center hole punch is suitable for a variety of tasks,such as mark on materials,car emergency tools,alternative emergency hammer,and Iron plate positioning,wood positioning,wall positioning,etc. The pocket automatic center punch body has deeply knurled finger grip to achieve easy handling and better control;the non-pinch comfortable cap makes a for your palm against spring impact. Impact strength adjustable,spring tension adjusts for light or heavy strokes,marking,punching and staking. Use head to align with the positioning point.Firmly the handle and it in the direction of the punch.After the punch is pressed back into the rod for a short period,the strong spring vigorously eject the punch Color: gold+silver Material: HSS Size about: length 12.8cm Package Contents: 1 * gold hooded 1 * silver hooded Only the above package content, other products are not included. Note: Light 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.