Viking Drill and Tool 39880 Type 260-D 135 Degree Split Point M42 Cobalt Screw Machine Drill Bit (12 Pack), 3/16" High Speed Steel Screw Machine M42 Cobalt 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 M-42 Cobalt contains 8-percent cobalt Screw machine length