EAGLE TOOL US EHS37518 Cable Installer Bit,3/8in,HSS 20FR50
Screw Point, Cable Installer Drill Bit, 3/8 in Drill Bit Size, Straight with Three Flats, 18 in Overall Length, Shank Diameter 3/16 in, Powder Coated, Maximum Drilling Depth 16 in, Shank Hex Size 3/16 in.