Motivx Tools MX2620 Adjustable Pocket Size Automatic Center Punch with Anodized Aluminum Body and Hardened Steel Tip At 5-1/2" long and slimmer than most other pocket size automatic center punches, the mx2620 is a perfect fit for your pocket This automatic center punch features a red anodized aluminum body, long lasting hardened 6150 alloy steel tip and a spring steel pocket clip The striking force is adjustable by rotating the knurled top cap so a heavier or lighter strike can be obtained This spring loaded automatic center punch is perfect for marking hole locations in steel for drilling or fastening and also helps start drill bits The automatic center punch action is activated by downward pressure against a hard surface, no hammer required