5 out of 5
Customer Reviews
By
LAWRENCE MAJKRZAK
Date: September 10, 2021
With a hand drill, this cobalt step bit drilled through black pipe many times faster than regular one-size drill bits, cobalt or otherwise. It was also able to slightly enlarge an existing hole drilled into a steel tube without breaking my arm. Worth the money.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By
Johnner
Date: August 18, 2021
I bought this to drill a nearly one inch hole in a decently thick stainless steel commercial stock pot.I assumed it'd have a hole after a lot of time, drill batteries and bit lube. Surprise! This bit easily ate a nice, clean hole.Nothing makes me quite as happy as quality.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
J.B.
Date: August 17, 2021
I've bought a few to enlarge holes in fairly thin stainless steel. This was by far the best! Don't get fooled into buying cheaper unfamiliar name versions. The others (HF versions and another one from here) dulled significantly faster and proved to be regretful purchases. This one is good!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Joshua
Date: June 15, 2021
I have been using step-drills or “unibits” for over a decade. These are especially useful for metal work and when you need to have the edge finished nicely. This Irwin bit starts easily with or without a pilot hole and cuts very smoothly through most metals and wood.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Charles A. Johnson
Date: May 15, 2021
A o/k
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Heod Mosa
Date: May 07, 2021
Me a sido de mucha utilidad este producto, creo que cuando se arruine con gusto comprare otro. Gracias
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
harleyhoss
Date: March 13, 2021
Bit works great I am very happy with it
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Nazdrowie
Date: February 23, 2021
Used it about 20 times already so far no complaints.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Lee
Date: February 22, 2021
Works as expected and has stayed sharp
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Blueroom57
Date: January 23, 2021
First time drilling steel so I did my research. I used cutting oil, low RPM, as much downward force as I could muster with my arms, and only drilled for a few seconds at a time so the metal being drilled wouldn't get work hardened. I drilled 10 holes through a steel trailer frame. Worked perfectly. Not sure how many more holes it might be able to handle but it drilled the last hole as well as the first. I had 2 different sizes to drill. I used this bit to get to within 1 step size of the final hole and then used a straight bit for the final dimension.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Chingo Mandinguez
Date: November 30, 2020
Trusted Irwin quality, very tough and long lasting bits.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Dan D Grand Blanc MI.
Date: November 10, 2020
Very sharp. Works great
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
James A. Grim
Date: October 31, 2020
This product makes it easier to make perfectly round holes in sheet metal safer and more easily. Start with a small pilot hole and then use the step drill to make your final hole size.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
James A. Grim
Date: October 24, 2020
This step drill will give you a round hole in sheet metal no matter what. Not like a regular drill bit where the hole may get irregular in sheet metal. Also works very well to enlarge a hole in sheet metal because you can work your way up from a small hole to a much larger hole without the drill catching and tearing a hole in the material.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Jonathan
Date: September 22, 2020
This works great on heat treated steel and titanium
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Scot Long
Date: September 02, 2020
Uni it works great. But be careful the tip on mine broke off really easily.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
marynell
Date: September 01, 2020
Great little tool. Used it to make draining holes in plastic flower vaces for cemetery.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
A Customer
Date: August 06, 2020
Had to get this 4 bit to make some 13/16 hole in plastic.I`ve had my 502 Unibit 3 pc. set -- bit numbers -- 1, 2 3 -- for over 20 years, (when it was made by American Tool Companies, Inc. ).I use my Unibit`s occasionally for holes in sheet metal and thin plastics. They always produce a smooth round hole.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]