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Our Jobber Drill Bits meet National Aerospace Specification (NAS) 907 Type B for superior performance in tough environments. With a TiCN coating that's harder and more wear-resistant than TiN, these bits are designed to withstand the demands of drilling into hard materials like metal or plastic. Ideal for machinists, contractors, and do-it-yourselfers, our Jobber Length Drill Bits come in size S with a decimal equivalent of 0.3480 and a measurement system of Letter. Crafted from high speed steel, these bits deliver exceptional strength and durability for longer lasting performance. Use them for a variety of applications including machining, construction, automotive repair, and woodworking. Upgrade your drilling experience with our Jobber Drill Bits and achieve perfect results every time.