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Brand Name: Milwaukee *Sub Brand: RED HELIX *Diameter: 5/16 in. *Overall Length: 4-1/2 in. *Material: Cobalt Steel *Style: THUNDERBOLT *Product Type: Drill Bit *Number in Package: 1 pc. *Usage: For Cast Iron and Stainless Steel *Flute Length: 3-3/16 inch *Finish: Cobalt Coated *Packaging Type: Carded *Shank Type: 3-Flat Shank *135 degree split point for precision start no walking * Aggressive 35 degrees cutting edge which ends at 15 degrees providing faster material removal *Discovery ACC, CON, NBR, SUP, EXP