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 2-5/16-Inch parabolic flute with 135-degree split point to drill and remove drilled out material. It measures 3-1/2-Inch x 3/16-Inch Dia. This drill bit comes in black oxide finish. The thicker web of this drill bit offers better strength and life.