1/4"-1-3/8" M2 Step Drill Bit Unibit for Hole Drilling 5 Sizes

Welders gave me the thumbs up. Quality tool for the cost. Ease of use. No problems. Different sizes make it space saving & cost effective. My understanding is, it's sharp & good cut. Strong materials.

As advertised, this made short work of drilling a new hole in a stainless steel sink. I was a bit skeptical when ordering however it worked really well and looks like it will continue to be usable for some time. If drilling a lot of holes in stainless this is probably not the ideal tool but for the occasional work it knocked it out of the park. Recommended!

Works great! Good buy!

Works great right now after 1 use see how long it lasts

Works great

This turned out to be a great step bit. I first used it on a stainless steel sink to enlarge a hole for a soap dispenser.It worked great for that. I used an ice cube on the hole and on the bit while drilling in order to keep everything cool.I also used it to drill a new drain hole in a plastic boat and it worked fine for that. I really liked the off color rings on it to easily see what depth I was at.Even though I think this is a great product I would consider a more expensive higher end brand if I was going to be drilling multiple holes in stainless steel

Went thru and spent a lot of time trying to drill thru a SS Sink flange to no avail using traditional tungsten and carbide bits (over an hour). Was looking for alternatives when I came across this. I have never used this type of bit. So I decided to give it a try and kill two birds with one stone. To my amazement, it cut thru the SS flange like butter. In less than a minute it made the hole. Worth every penny. Can't say enough how impressed I was, and it is still sharp.

Bought a kitchen sink ar Costco recently lacking a 1 3/8" soap pump hole for a undercounter sink mount for our new granite countertop install. When the guy came out the measure, I found out that they had a policy for liability reasons of not drilling holes in costumer sinks.I wanted the sink and wanted the pump, so I said I would find a way to drill the hole.I read a lot of reviews on Amazon for step hole drills and found reviews that that had some praising the drill's performance on stainless steel while others saying that the drill never worked. I looked at the design of the drill and figured out what the problem was.Stainless steel is very hard (several times harder than sheet metal) so getting started is a separate process. The trick is to first drill a small diameter pilot hole using carbide tip drill bits and, once started, increase the diameter, one size at a time, until you get to about a 1/4" diameter. Then use this step drill. Take your time, don't make the mistake of drilling at high speed because the high heat friction can make the SS metal even harder, and get milling oil (Amazon had some for less than $5) to keep the friction heat down. If the drill site starts smoking, it's usually the milling oil burning. Stop immediately, make sure the bit cooled down, then apply more oil before starting again.Take your time and you will be surprised how well it works.

Great tool, it works well. Came on time

Bought this bit to make a hole in my stainless steel sink. It worked very well! Would recommend buying it.