Irwin (928) 3018002 IRWIN Cobalt M-35 High-Speed Steel Drill Bit Metal Index Set, 29 Piece, 3018002

Constructed of M-35, 5% cobalt, high speed steel for super abrasive resistance and faster cutting than M2 in tough metals, the IRWIN Cobalt Metal Index Drill Bit Set features 135° split point tips that start on contact and cut with less force. Reduced shanks above 3/8" allow you to use the larger drill bits in a standard 3/8" chuck. The included case has removable cartridges to carry bits from case to worksite safely.