WALTER - 57/64 SST PRENTICE DRILL - 01M557

SST+ 1/2" Prentice are heavy-duty large diameter drill bits for use in portable drills, drill presses and magnetic base drills with 1/2" chuck capacity. Their extra hard tips allow for the drilling of many more holes between re-sharpenings. They are made with a cobalt blend for longer life.
Made with premium grade cobalt HSS to drill harder materials
Self centering 135° split-point for reduced thrust requirements and minimized walking
Cobalt drills can drill approximately 30% faster than HSS drills
Special bronze SST surface treatment for extreme lubricity and life
1/2" reduced shank
3-flats shank for reduced slippage in drill chucks