Large Cobalt Drill Bits + Cobalt drill bits + 9/16" to 1-1/4" Cobalt Drill Bits + Cobalt Drill Bit Set
M42 Cobalt Drill Bits. Sizes above 1/2" The Best in the Industry.
Long Lasting and perfect for serious drilling applications in hard stainless steel and other heat treated materials. Gold, Ground From Solid M42 Cobalt, NOT just Coated. These are the real McCoy, The very best!