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Irwin 10231 Unibit #1 13-Step 1/4-Inch Step Drill Bit, 1/32-inch Steps (1/8- to 1/2- inches) Save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. Patented single-flute cutting edge gives greater control through steps and a true round hole every time. Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. SpeedPoint tip penetrates faster than previous Unibits and prevents walking. 3-faltted hex shank prevents slipping in drill chuck. Drill diameters etched in flute for easy identification.
From the Manufacturer
UNIBIT 1 13 Hole Sizes (1/8"-1/2"), 1/32" Increments
BOB SHEA
2025-08-28 19:27:16
Very Niiicccce.
zhenrong yang
2025-08-19 13:17:39
I bought this one to drill an end pin hole on my guitar for pickup installation. It worked flawlessly.
Robert Phifer
2025-08-15 20:00:08
This is an excellent choice for anyone looking to use snap toggles through metal studs. (Also I'm sure for a million other purposes but that is what I regularly use it for)Goes through quickly and cleanly.
rosy1111
2025-08-14 13:24:38
Didn't know these existed til now! Especially useful when having to make a pilot hole first, before drilling a larger hole.
Louie
2025-08-05 12:43:03
Love this step bit , great for impact !
Eric S.
2025-05-30 13:55:32
Bought this as a replacement for one I work out. They are well made, I just used it that much (probably abused it a bit to). My hobby is restoring muscle cars and these bits work perfect for drilling metal. Drilling sheet metal it leaves a very clean hole (unlike a normal bit). Have also used it on thick metal (3/8" steel).
Anonymous1
2025-05-21 14:34:44
It does a clean and professional drill every time and is made of high quality material that doesn’t easily break, also the value was very good
Customer
2025-03-21 10:48:31
All good as described.
Philip Cowing
2025-02-24 17:24:24
Superb highly recommend
ACG Electrify
2025-02-19 19:11:06
Cuts through sheet metal with ease. I have used Irwin and I have used Klein unibits. The Irwin bits stay sharper longer.
Michael
2025-02-17 09:30:36
It kept wanting to walk even with vise and drill press.Hole is not concentric.
serge grignon
2025-02-11 15:56:08
Le forêt a un embout plat donc il patine sur le metal
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