![Irwin - Drill Bit Set: Step Drill Bits, 3 Pc, 0.125″ to 0.75″ Drill Bit Size, Cobalt - 82688789 - MSC Industrial Supply Irwin - Drill Bit Set: Step Drill Bits, 3 Pc, 0.125″ to 0.75″ Drill Bit Size, Cobalt - 82688789 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/8268878-23.jpg)
Irwin - Drill Bit Set: Step Drill Bits, 3 Pc, 0.125″ to 0.75″ Drill Bit Size, Cobalt - 82688789 - MSC Industrial Supply
![IRWIN Unibit High-Speed Steel Fractional Self-Starting Step-Drill #5, 10235 - Jobber Drill Bits - Amazon.com IRWIN Unibit High-Speed Steel Fractional Self-Starting Step-Drill #5, 10235 - Jobber Drill Bits - Amazon.com](https://m.media-amazon.com/images/I/41Z1J01BQiL.jpg)
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: 3/16 to 1/2″ Dia, 1/4″ Shank Dia, Cobalt, 6 Hole Sizes - 06560627 - MSC Industrial Supply
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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 Unibit 3/8-in 2-Step Drill Bit (7/8-in and 1-1/8-in) in the Step Drill Bits department at Lowes.com IRWIN Unibit 3/8-in 2-Step Drill Bit (7/8-in and 1-1/8-in) in the Step Drill Bits department at Lowes.com](https://mobileimages.lowes.com/productimages/10afd124-f67a-4fef-9834-bab8857d75a6/42174942.jpg)
IRWIN Unibit 3/8-in 2-Step Drill Bit (7/8-in and 1-1/8-in) in the Step Drill Bits department at Lowes.com
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Irwin Tools Unibit #3 1/4-Inch to 3/4-Inch Step-Drill Bit, 3/8-Inch Shank (10233) - Unibit - 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
![IRWIN Unibit 502T Step Drill Bit Set with Nylon Pouch, Titanium Nitride Coated, 3pc (15502) - Amazon.com IRWIN Unibit 502T Step Drill Bit Set with Nylon Pouch, Titanium Nitride Coated, 3pc (15502) - Amazon.com](https://m.media-amazon.com/images/I/619s5nkm4bL.jpg)
IRWIN Unibit 502T Step Drill Bit Set with Nylon Pouch, Titanium Nitride Coated, 3pc (15502) - Amazon.com
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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
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