General Tool 78 Center Punch Heavy Duty Steel Automatic (31066)
• 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-resistant black oxide finish - See more at: https://www.generaltools.com/hand-tools/precision-measuring-marking/heavy-duty-automatic-center-punch#sthash.dMvNBYhv.dpuf
• Replaceable hardened steel point (#78P)
The #78 Heavy-duty Automatic Center Punch can punch, mark, scribe and start drill, nail or screw holes. It is ideal for machinists and automotive repair pros.