Viking Drill and Tool 87200 Type 250-UB 135 Degree Split Point Magnum Sup Premium Mechanical Drill Bit (6 Pack), 1/2" Premium Mechanic 3-Flats on Shank 135-Degree Split Point 135-Degree split point for accurate centering and fast penetration Precision ground point, flutes, body, clearance and drill diameter for ultimate accuracy and performance Special Hi-Molybdenum tool steel/Gold Oxide Mechanics Length 3-flats on shank