Tools IRWIN Step Drill Bit, 1/8-Inch to 1/2-Inch Step, 1/4-Inch Shank (10231) Silver|Silver metallic

Wonderful bit. It cut through my 2mm aluminum bracket quite easily. Haven't tested on other metals but seems sharp and durable.

Cuts clean & easy

This is the 3rd Unibit of this size in the last 10 years that I have owned, it is not that it is poorly made, its just that I keep using them. This is the only bit that I have found that I can cut gasket foil, if I do not have a punch that size (requires some trickery). It has many, many uses and I keep finding new ones. I have tried other brands but in this style, of the major brands, this last the longest of the non-impact tapered bits. I have run it at 7,500 rpm without incident and as slow as 2 rpm on 1/8" titanium sheet (prepunched starter hole). The Unibits may seem expensive when compared to HF or other cheap brands but with these you get quality and service life.

Did the job, drilling holes in steel edging; the thicker, older stuff. I didn't try it on high speed, but low, using lots of 30W oil and it did cut well....once you got it started. Used a center punch to start the holes, but found that they needed to be deeper before the drill point would catch. Once it caught, it was easy going......with pressure :) Pricey, but worth it for my project.

Love this step bit , great for impact !

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

Bottom line? Life would just stink without Unibits (step drills). I bought my first one in about 1995 building race cars. I use them as much everyday as most people use a fork or knife. This is a great tool. Unibit tip: A common complaint of people using step drills is that they forget which "step" they are drilling to and over drill their hole. I always have a sharpie in my pocket. I just color the step I am drilling to with my sharpie. When I get to the "black sharpie" step, I stop, and the metal gets rid of most of the sharpie so I am ready to make a new mark on the next hole. It works for me. Perhaps it will help avoid overdrilling.

This bit is very aggressive in removing steel. I've never had it hang up and take my wrist for a ride. A small pilot hole lets this bit work alot faster, but is not required. I also like that it's made for an impact driver instead of a drill. I'll be buying more of these as I eventually wear them out or lose them.

tremendo producto. es una estupenda inversión. tiene una durabilidad increíble.

Superb highly recommend

Cuts through sheet metal with ease. I have used Irwin and I have used Klein unibits. The Irwin bits stay sharper longer.

It kept wanting to walk even with vise and drill press. Hole is not concentric.

Le forêt a un embout plat donc il patine sur le metal