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The Irwin Unibit #4 3/16 In-7/8 In, MPN 10234SM, is designed to drill a range of hole sizes from three-sixteenths inches to seven-eighths inches in precision increments. This high-speed steel step drill bit features a three-eighths inch shank and a self-starting tip for increased efficiency.
This product is suitable for drilling thin materials like mild steel, copper, aluminum, wood, and more.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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