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Brand Name: Milwaukee *Sub Brand: RED HELIX *Diameter: 1/4 in. *Overall Length: 4 in. *Material: Cobalt Steel *Style: THUNDERBOLT *Product Type: Drill Bit *Number in Package: 1 pc. *Usage: For Cast Iron and Stainless Steel *Flute Length: 3-1/8 inch *Finish: Cobalt Coated *Shank Type: 3-Flat Shank *Packaging Type: Carded *135 degree split point for precisionstart no walking * Aggressive 35 degrees cutting edge which ends at 15 degrees providing faster material removal *Discovery ACC, CON, NBR, SUP, EXP