Drill America - DWT54728 1/2"-13 UNC High Speed Steel Bottoming Tap, (Pack of 1)

I have only used this set once so far, but that's all I really hoped to get out of it. I have an aluminum AeroPrecision lower that came to me with a stripped or poorly threaded takedown pin mounting hole, which takes a 4-40 setscrew.I used the bottoming tap in this set and a little oil to successfully re-tap the mounting hole. These taps are tiny and any tap handle you already have will likely be too big. You need what is called a pin vise, basically a handle with a small collet on the end, to hold these small taps.These taps saved me a whole lot of hassle, dealing with returning a serialized item for warranty work. They cut quickly and smoothly, at least in aluminum. Worth every penny, even if I never use them again. Besides, what real man has ever said "I wish I had less tools?"

This 1/4 inch tap works great.My DR. Pilot trimmer Mower. Was a bad purchase.The replacement $100. plus power head had to be tapped. It is made out of aluminum.This made it possible to fix my walk behind trimmer.

The tap set (I ordered #8-32 3-piece set) arrived promptly. It was nicely packaged and appeared to be of good quality. The cutting surfaces were sharp, and the taps nicely finished. I used them to tap several blind holes in brass, and they worked just fine. Other reviewers have complained that they are flimsy and not durable, but I certainly didn't observe that. They seem just like any other tap I have used in the past. I'd definitely recommend them.

Decent tap set. I got a little greedy and broke one but no big deal. Cut really good and they have lasted through a lot of holes.

Drill America seems to make good taps and drill bits . They hold up well

I've used this set several times now and have been pleased. With the three piece set I have also demonstrated to the younger generation the difference between the taper, plug, and bottoming taps. If I ever need to use the bottoming tap in a critical application i might grind a little bit off the bottom to make it sit even lower, but I might not see something like that again in 50 years.

Got these on Sunday, used them on Monday. Fast delivery, well packaged. The taps worked very well for retapping existing holes. They made the install job easy. I would recommend this tap set.

Bottoming taps are the way to go for rethreading. These are sharp, accurate & suitable for steel as well as other metals.