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The Irwin Unibit #4 step drill bit features 12 steps ranging from 3/16" to 7/8" in 1/16" increments, letting you drill multiple hole sizes in thin materials without swapping bits. Each smaller step acts as a pilot for the next size, and the patented SpeedPoint tip penetrates faster while preventing walking—eliminating the need for a center punch.
Constructed from industrial-grade high-speed molybdenum steel with heat treatment for maximum durability, this bit is ideal for use on stainless steel, copper, brass, aluminum, plastic, and laminates. The 3/8" shank design makes it compatible with standard drill chucks for convenient, versatile use in any workshop or job site.
1 days
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The Irwin Unibit #4 step drill bit features 12 steps ranging from 3/16" to 7/8" in 1/16" increments, letting you drill multiple hole sizes in thin materials without swapping bits. Each smaller step...
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