The Irwin 5.5mm HSS Cobalt Drill Bit is designed for medium-duty drilling in stainless steel and other high alloys. This diameter is particularly useful for larger clearance holes, pilot holes for tapping operations, and general metalworking applications where a balance between hole size and precision is required. Manufactured from high quality HSS steel with 5% Cobalt content, this drill bit offers exceptional heat resistance and significantly extended life when drilling demanding materials. Th
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