DEWALT DW1637 Drill Bit, 2-1/8 in Dia, 6 in OAL, 7/16 in Dia Shank, Ball Groove, Hex Shank

With an aggressive spur for fast material penetration, DeWALT® self-feed bits feature optimized cutting geometry for long life and an open tooth design for easy re-sharpening. A 7/16 in ball groove shank offers quick-change applications.