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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.
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