Vulcan 231831OR Jobber Drill Bit, 5/16 in Dia, 4-1/2 in OAL, 3-Flat Shank

High-speed steel with a 135 deg split point eliminates the need for center punch and keeps drill from skating on hard surfaces. Used to drill most ferrous and non-ferrous metals. All sizes 3/16 in and larger have three flats on the shank for a better grip on the chuck. Jobber length.