Back Home / Cutting Tools / Drill Bits / DRILL BIT-HEAVY DUTY JOBBER LENGTH, 15/64″ DRILL BIT-HEAVY DUTY JOBBER LENGTH, 15/64″ SKU: TID1564 Categories: Cutting Tools, Drill Bits Diameter of 15/64″. Jobber length, 3-7/8″. 135° split point. Black oxide finish. Heavy duty construction. Recommended for portable drilling of low to medium carbon steels, cast iron and wood. Diameter of 15/64″. Jobber length, 3-7/8″. 135° split point. Black oxide finish. Heavy duty construction. Recommended for portable drilling of low to m Case Quantity: 12 Log In For Pricing