Vulcan 219971OR Jobber Drill Bit, 5/16 in Dia, 4-1/2 in OAL, 3-Flat Shank

Titanium nitride coating reduces friction and last longer, cutting edge stays sharper longer. Split point eliminates the need for a center punch and keeps the drill from skating. All sizes 3/16 in and larger have three flats on the shank for a better grip on chuck.