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Unibit® Hex Shank TIN HSS #4T Self Starting Step Drill Bit comes with titanium Nitride coating that extends cutting edge life up to six times.
Unibit® Hex shank TIN HSS #4T self starting step drill bit with 3/16" - 7/8" Dia includes 1 number of flutes and hexagonal shank. Bit with 3/8" Dia shank is ideal for drilling holes into thin materials.
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