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IRWIN Unibit High-Speed Steel Fractional Self-Starting Step-Drill #5, 10235 - Jobber Drill Bits - Amazon.com
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Irwin - Step Drill Bit: 1/8 to 1/2″ Dia, 1/4″ Shank Dia, Cobalt, 13 Hole Sizes - 82688730 - MSC Industrial Supply
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Irwin Unibit 1/4-1 3/8 in Self-Starting Step Drill Bit 10235, High-Speed Steel, Hex Shank | RSHughes.com
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Irwin - Drill Bit Set: Step Drill Bits, 3 Pc, 0.125″ to 0.75″ Drill Bit Size, Cobalt - 82688789 - MSC Industrial Supply
![Irwin® Unibit® 15502 General Purpose Step Drill Set, #3 Min Drill Bit, #1 Max Drill Bit, 3 Pieces, HSS, TiN Coated | Groves Industrial Irwin® Unibit® 15502 General Purpose Step Drill Set, #3 Min Drill Bit, #1 Max Drill Bit, 3 Pieces, HSS, TiN Coated | Groves Industrial](https://cdn.grovesindustrial.com/img/groves/product_images/1/Irwin_Unibit_15502_HR.jpg)
Irwin® Unibit® 15502 General Purpose Step Drill Set, #3 Min Drill Bit, #1 Max Drill Bit, 3 Pieces, HSS, TiN Coated | Groves Industrial
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Irwin 11105ZR Unibit5M 5-Millimeter to 35 -Millimeter by 1/2-Inch Shank Step Drill Bit - Unibit Irwin - Amazon.com
![Irwin - Step Drill Bit: 3/16 to 1/2″ Dia, 1/4″ Shank Dia, Cobalt, 6 Hole Sizes - 82688748 - MSC Industrial Supply Irwin - Step Drill Bit: 3/16 to 1/2″ Dia, 1/4″ Shank Dia, Cobalt, 6 Hole Sizes - 82688748 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/8268874I-21.jpg)
Irwin - Step Drill Bit: 3/16 to 1/2″ Dia, 1/4″ Shank Dia, Cobalt, 6 Hole Sizes - 82688748 - MSC Industrial Supply
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IRWIN Step Drill Bit, 3/16-Inch to 7/8-Inch, Cobalt Alloy Steel, 3/8-Inch Shank (10234CB) - Amazon.com
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Irwin - Step Drill Bit: 3/16 to 1/2″ Dia, 1/4″ Shank Dia, Cobalt, 6 Hole Sizes - 06560627 - MSC Industrial Supply
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Irwin - Step Drill Bit: 1/4 to 3/4″ Dia, 3/8″ Shank Dia, Cobalt, 9 Hole Sizes - 82688755 - MSC Industrial Supply
![IRWIN Unibit 3-Piece Set Step Drill Bit Set (3/16-in to 7/8-in) in the Step Drill Bits department at Lowes.com IRWIN Unibit 3-Piece Set Step Drill Bit Set (3/16-in to 7/8-in) in the Step Drill Bits department at Lowes.com](https://mobileimages.lowes.com/productimages/8aab6c58-579f-4ea7-9da7-22e9aaa892d0/42172851.jpg)