Irwin Unibit

Buy Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit. Each smaller size drill also acts as Irwin Unibit a pilot for the next size The single radial flute assures perfectly round holes Step Drills are self-starting and will not slip.Drill diameters etched in flute for easy identification. Non-skid tip means no need for center punches 3 flatted shanks prevent drill chuck slipping ... Learn more »

Irwin Unibit Review: Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit. Used mainly to enlarge pilot holes in old beer kegs (stainless steel) for brewing purposes, after you drill a pilot hole and use some cutting oil, this bit goes right through to your desired diameter. Highly recommended. 5 ... Read more »

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