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Unibit® Hex Shank HSS #21 Hole Enlarging Step Drill Bit, 13/16 - 1 3/8 in: It is made of tough steel for maximum life.
Unibit® Hex shank HSS #21 hole enlarging step drill bit with 13/16 - 1 3/8" Dia includes 1 number of flutes and 3 flatted hexagonal shank. Bit with 7/16" shank is ideal for drilling holes into thin materials.
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