General Tools Mini Heavy-Duty Automatic Center Punch One-handed spring impact operation; no hammer needed.. Spring tension adjusts for light or heavy strokes and marking.. All-steel body with knurled finger grip, and rust- black oxide finish.. Replaceable hardened steel point.. Dimensions 4-7/8 in. (L) x 1/2 in. (Diameter). Pack of 1 WARNING: This product can expose you to Nickel, a chemical known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov - Nickel (Metallic)