Automatic Center Punch No Hammer Needed-;automatically Strikes A Sharp Blow When You Press Down On Punch. Adjustable Knurled Cap Regulates Force Of Blow. Use For Marking, Punching, Riveting, Or Making A Hole Or Indentation To Prevent Drill Bits' Wandering. Brass Body With Heat-treated Alloy Steel Point. 5" L X 1/2" Diam. Replacement Point...