This 11.5mm Irwin HSS TCT drill bit delivers precision drilling at a larger intermediate diameter for industrial applications in hardened materials. The 11.5mm size is particularly valuable for specific engineering tolerances and applications where standard 11mm or 12mm sizes don't provide the exact clearance required. The C2 tungsten carbide tip is specifically engineered to penetrate hardened steel, cast iron, bronze alloys, and manganese alloyed steel, handling materials up to 50 Rockwell C h
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