M42 Cobalt A thru Z Drill bit Set – Screw Machine length (STUBBY)
DrillBitWarehouse M42 Cobalt A-Z Stubby Drill Bit Set – Made in USA
This 26-piece A–Z letter set is part of our Super Sonic™ T-200 line, built from M42 Hi-Molybdenum Cobalt steel and fully ground to NAS 907C aerospace specifications. These screw machine-length (stubby) bits are engineered for high-performance drilling in stainless steel, titanium, tool steels, and other hard alloys—delivering clean, accurate holes in tight or shallow spaces where rigidity matters.
With a 135° split point, these bits start fast, reduce walking, and cut efficiently without the need for a pilot hole. Finished in gold for improved wear resistance and heat dissipation.
Set Includes:
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26 drill bits – Sizes A through Z
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Screw Machine Length (Stubby)
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Fully ground M42 Cobalt – USA Made
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Packed in a steel indexed case
Which Set Is Right for You?
For heavy-duty, high-precision applications in hardened metals, the Super Sonic T-200 Series delivers serious performance. If you’re equipping crews or running field jobs where bits take a beating, our Predator M35 A–Z Set offers the same sizing with 3-flat shanks on larger sizes and rugged reliability built for job site use.
Many customers keep both—Predator on the truck, Super Sonic on the bench.
