Viking Drill and Tool 79680 Type 240-DN M42 Cobalt 135 Degree Split Point Boring Bit (6 Pack), 3/16" High Speed Steel M42 Cobalt TiN-Titanium Nitride Coated 135-Degree Split Point NAS 907J 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 - titanium nitride coated NAS 907J Cobalt Jobber Length