Walter 01-M 540 5/8 SST Reduced Shank 135 Degree Prentice Drill Bits 1/2 Shank With 3 Flats

Heavy-duty large diameter drill bits for use on portable drills, drill presses and magnetic base drills with 1/2 Inch chuck capacity. Extra hard tip allows to drill many more holes between re-sharpenings. Now made with cobalt blend for longer life.