Hymnorq Combination Tap and Drill Bit - TIAIN Coated, M35 Cobalt Steel, 118° Split Point, M6 x 1mm Thread, 1/4 Inch Hex Shank, Heavy Duty for Hard Metals Like Stainless Steel

Most of these sorts of bits on Amazon are crap. These are not. These are awesome.

The bit is very hard but not hard enough for tool steel that is really hard

I am very happy with this tap set so far. I specifically bought this set in order to get the 2 smallest sizes in the set. Do at your own risk. I saw a video online where a machinist took a small tap and threaded the spring hole on a lower receiver, cut down his rear takedown pin spring to compensate for the allen type set screw length, and he successfully eliminated the need to "smash" the rear takedown pin spring against the stock or sling plate. I have done 2 myself, and I can tell you it has worked great. I put this combination 1/8" - 40 NS drill/tap into a hand "dogbone" ratchet and took my time, making sure to back out the shavings every few 16ths. It came out beautifully. Now I only need to remove the set screw in the event I want to dismantle the rear takedown for some reason, and now I can switch stocks at my leisure without having to worry about losing the spring or smashing/kinking the spring. I also really like not having to hunt for the proper drill size in order to tap. In addition, I also really like having the quick-change ends so these can be used in a hand ratchet, a mini impact, or a cordless drill.

I have used tap and dye products before and couldn't believe there's one product that does it all. The product is phenomenal. It worked exactly as I was hoping for. The only warning is to watch for your desired depth may not thread deep enough for what you're looking for, but for me, it was perfect.

If only I would have read the description I would have saved this piece of stainless steel. If you're wondering what I am referencing, it says to use in thin metal only. Welp as you can see from the picture this tap snapped in the hole and I could not get it out by any means which really sucks.Didn't want to give it a super low rating because it's half my fault for buying in a rush but can't go higher than 3 since well, it broke.

I used this combo bit to drill and tap a hole in the dropout of an aluminum mountain bike for a disc brake conversion bracket. Once I made the mark of where the center of the hole would be, I center punched it and started off with some cutting oil and a small drill bit for a pilot hole. I then switched to a slightly larger size drill bit to further widen the hole. Finally, using the combo bit in a cordless clutch power drill and some cutting oil, I slowly drilled and tapped the hole. To prevent damage to the threads when reversing out, I un-chucked the bit from the drill and reversed it by hand using a T-handle socket drive. Took some time, but it worked great and it didn't snap. All in all, great product.

Not for metal. Maybe 1/4 inch thick aluminum at best.

First, being only a garage wood hobbyist, my experience depth is shallow. I was looking for a creative way to attach metal legs to a live edge table I had just finished. While think I just didn't think using a screw was going to give me the holding power I would need. I found these online and tried a few scrap pieces first. My method was to drill a small hole first, then using the tap and only go in. I removed the drill and used a small wrench to slowly back out the tap. I was concerned I might strip the hole reversing the drill. Since this time, I have done several other jobs and will probably look to this, instead of thru bolts or screws.

I had no expectations about this product. It just needed to perform on a couple of current projects, and it did, but I would not expect more demand than that. You could call it a 'in a pinch' product:-)

Top product brilliant service, next day delivery from an online purchase absolutely amazing, te drills work just as I hoped they would, highly recommended for wood (all I wanted them for)

It works great on a building beam. Worth the money.

Funcionan excelente, facilitan mucho el trabajo y la rosca es muy fácil de hacer

Not bad but very fragile.