EFFICERE40-Piece Premium Tap and Die Set, SAE Unified Screw Thread, Size #4 to 1/2” | Include UNC Coarse, UNF Fine and NPT Threads | Essential Threading Tool Kit with Complete Handles and Accessories

Works well for an inexpensive set. I have purchased several of these and all have worked well.

I needed to cut some 6-32 threads in some stainless steel rods used to secure engine baffles underneath the engine for a Vans RV-9 Home-built Aircraft. I tried to make the threads with my Harbor Freight die that is made of carbon steel but it would not even scratch the surface of the stainless rods. I needed a much harder die that could cut stainless steel. I did some research and found that high quality dies that are made of Cobalt Steel, Titanium Steel, or High Speed Steel (HHS) could cut stainless. I happened to find this set and the product description said it is made of GCr15 Bearing Steel hardened to Rockwell 60 and could cut stainless. I didn't know what GCr15 steel was but I found the following definition online: GCr15 steel is one of the most commonly used Chinese bearing steels, it’s a high carbon chromium bearing steel with high hardenability, high & uniform hardness after heat treatment. I also looked up the rockwell 60 number which is based on a standard hardness scale that goes up to 62 so 60 is at the top of the range when it comes to hard steel. I was still a little skeptical since the price of this set was very low compared to other sets or individual dies I could find for cutting stainless. I decided to take a chance and try this set out since it had lots of good reviews saying the taps and dies in this set seemed to work well for most everyone who bought them and also several good comments about the customer service willing to refund customers who had any dissatisfaction with the product. My set arrived from Amazon in 2 days from ordering. I tried them out over the weekend and they cut very nice accurate threads in my stainless steel rods very easily while using a couple drops of tap magic oil. This set performs as advertised, it is made of industrial quality steel that can cut stainless steel. The other reviews also said the handles the set comes with are lower quality but I would say the handles are comparable to the ones that come in a Harbor Freight set. I also found on Amazon a very handy 5 piece set of GearWrench ratcheting handles for taps and dies that fit perfectly with this set and made the job easy. For the money, I don't think there is anything out there that compares to the quality of the steel in this set for cutting hard material.

The dies and taps themselves seem pretty good, but the wrenches don't seem to stand up to real work. If all you use this for is cleaning up existing threads it will probably be fine, but after cutting new threads onto some bar stock my die wrench is twisted so the dies barely fit in anymore, the set screw sheared off 3 times, and the hole for the set screw is mangled. Maybe it fares better cutting threads in copper or aluminum, but it's not really great for steel. Still worth the price just for the taps and dies, but I'd recommend picking up some solid wrenches for serious work.This review has been updated to reflect the great customer service from Efficere Tools, who contacted me to let me know they refunded the purchase price of the tap & die set. So while I can't give the set a full 5 stars for the reasons listed above, they definitely earned 4 for the good customer service. I'd be happy to buy from them again. And as I said above, the dies themselves were fine and a great deal, just plan to spend a little extra on a sturdy wrench to use them on steel.

Great Kit an a much have when working on your Harley!

Already put the sae set to work , worked like a charm thank's

Yet another time I was influenced by all the positive reviews and left disappointed. I’m pretty certain there’s a glitch in the review matrix here. The cases are decent, the taps I’ve used so far have all been good but I’ve been going very easy on them as I don’t want them to snap. Every single die I have used cut decent but the size was way off, to the point that they are worthless. Not one of the standard dies will even chase brand new bolts correctly so you can’t even just clean threads with them. The small compression tap holder is decent, the larger adjustable tap holder works but comes loose very easily and must be tightened repeatedly while cutting a thread. The die holder works but is very sloppy as the dies fit loosely.

Nothing wrong with these basic sets. These don't have frills, and they don't come with instructions, but you have YouTube, or some old mechanic you can ask.I needed to tap treads in some steel, and in brass. So, I did the male and female from dissimilar metals.The process was about as good as you can expect for a basic set like this, and the threads mated perfectly.Not sure how they would hold up if I was doing this all day every day, but that's not what this product is intended for. For what I wanted it was great.A bonus is the incredibly fast delivery from Amazon. Even my local hardware store could not get it this fast.

Needed to make 10 taps in some aluminum t-slot bars. Given the choices on Amazon, I could either buy this set or just the tap I needed and a seperate handle for a cost within about $5 difference.I decided to go with this set even with the reviews complaining about the handle.The good news; got all of the taps done and the tap I used didn't break, and still feels pretty sharp (used in aluminum).Bad news; the handle will not stay tightened against the tap. I had to retighten it over and over again.Bottom line, for light duty this set is ok, but you should plan on buying s separate tap handle.Did not used the dyes.