• Made with premium grade cobalt HSS to drill harder materials
• 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
Walter’s SST+ 1/2″ Prentice drill bits are heavy-duty large diameter 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. Plastic tube packaging. Package of 1.
Application: For high tensile steel, fits in a 1/2″ chuck
Drill Size: 1-5/16″
Flute Length: 3-1/8″
Overall Length: 6″
Shank Size: 1/2″
Material: Cobalt
Finish: Bronze Oxide
Click Here for the Walter Recommended Cutting Speed for Drill Bits Sheet
Click Here for the Walter Drill Bit Spec Sheet
