Milwaukee Tool Thunderbolt® Jobber length drill bit with round-shank, is ideal for general-purpose drilling and to cut metal, wood or plastic. It has 1-5/8-Inch parabolic flute with 135-degree split point to drill and remove drilled out material. It measures 2-3/4-Inch x 1/8-Inch Dia. This drill bit comes in black oxide finish. The thicker web of this drill bit offers better strength and life.