- DWD60J-CO-SET 60 Piece M35 Cobalt Drill Bit Set (Wire Sizes #1 #60), DWDCO
DWD60J-CO-SET 60 Piece M35 Cobalt Drill Bit Set (Wire Sizes: #1 – #60), DWDCO Series. Manufactured to National Aerospace standard 907. Made of heat resistant cobalt, they display higher red hardness which permits speeds upto 30 percent greater than High-Speed Steel drills and are especially effective in drilling tough, high tensile strength materials like PH stainless steel, inconel, and titanium.