Automatic Center Punch No Hammering - built-in mechanism delivers a punch just with the pressing of the head.. Tips are made from hardened tool steel and can be easily removed for resharpening or replacement. Stainless steel construction. Fully automatic single hand operated spring loaded punches. Variable depth impression simply by turning the knurled head. Screwing the cap downwards produces heavy indentation; progressively lighter marking can be obtained by screwing the cap upwards. Once the knurled cap is set to the desired position, the punch will strike the same depth every time. Round shank with clean and well knurling for positive non-slip grip. 5-1/4” Long x 9/16” Dia. point Dia. 0.07” 703