SST+ ½ Prentice are heavy-duty large diameter drill bits for use in portable drills, drill presses and magnetic base drills with ½ 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.
Drilling large diameter holes with portable drills; Drilling of round surfaces; Large diameter holes with stationary machines; Mild steel; Non-ferrous metalStainless steel; 3 flats on shank prevent slippage inside chuck; Drills more holes, faster; Exclusive point geometry eleminates pre-drilling; Special bronze SST surface treatment.
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