Viking Drill and Tool 58680 D-25M Type 643-D 135 Degree Split Point M42 Cobalt Drill Set (25 Piece). 25 pc Set Metric M42 Cobalt Jobber 135-Degree Split Point NAS 907 J. 135-Degree split point for accurate centering and fast penetration. 25 pc Set, 135-Degree Split Point. 135-Degree Split Point M42 Cobalt Drill Set. WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer.