Walter 01M559 59/64" SST 135° 1/2" Prentice Drill Bit

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. 

• Drill Size: 59/64"
• Flute Length: 3-1/8"
• Overall Length: 6"
• For high tensile steel, fits in a 1/2" chuck
• 3 flats on shank prevent slippage inside chuck
• Drill more holes, faster
• Exclusive point geometry eliminates pre-drilling 
• Special bronze SST surface treatment