BOOLY Premium-Grade Die Grinder Bits Carbide Burr Set 1/4 Shank 10PC+ Bonus | Fits DeWalt Milwaukee Die Grinder, Solid YG10X Virgin Tungsten, 6.35mm, Double Cut, Metal Grinding, 4-PC Screw Extractor Kit

Emotionally good. I never knew how well burrs could shape and remove metal until I actually got a good set. These are outstanding. I have been beveling, cleaning welds, making notches and everything in between, the last few days. Has been a game changer on fitments while building a 4 link rear end on my race car. So far I've ran them on mild steel, chromoly, and 1026 DOM. Eats them all. So far, no tip has shown any wear at all.

I thought that these would not last that long since they are very well priced. I was wrong, day of lasted me for a while and a great job with my grinder that I installed them on. For the price and equality it is well worth it.

Been using these for a while. I use them exclusively on metal. No issues with them and have seen no major wearing or damage to the bits. I use them in a husky pneumatic angle grinder (11k rpm) on various steels, aluminum and iron.

THESE ARE QUALITY! I bought these to help me drill out some hardened steel rivets while rebuilding the suspension on my truck. I had already snapped about 10 drill bits all cobalt bits of various manufacturers and saw no end in sight because I had to keep drilling out snapped bits. I could find nowhere locally that had a set of carbide burrs in stock. Amazon had these at my door the next morning. For 50 bucks these are worth their weight in gold. I had already drilled through the last 4 rivets I was working on with 5/64 bit. From there I used the carbide bits exclusively becauseat this point I had already snapped about every other drill bit I could step up to. The carbide bits ate through the metal with no issues. Slowest speed with cutting fluid stopping about every 30 seconds to blow chips/shavings off the bit and out the hole. The carbide burr bored through the entire rivet which was about 1-1/4in thick and a little over 1/2in wide. These saved me from pulling all the hair out of my head and is one of those things where I have no idea how I got by without them. If you are reading this buy the damn thing.

Preform way above price point! Have used these in a field/shop environment and they hold up better than other brands that cost a lot more.

I use these on my Milwaukee die grinder. Work great nothing to complain about. They’ve gotten the job done.

UPDATE: I finally used these and I must say, they are fantastic. I had to grind a very large nut that wasn’t budging for me. I used this to grind the metal away to be able to remove the nut. They worked perfect and never thought about breaking or bending. So happy they are so strong. Although I have not use these yet, they look like very solid. I bought some grinding bits a few weeks ago and they all fell apart. They were so thin on the shaft. As I stated these look very thick and they feel really solid. I can imagine they’re going to hold up well once I start using them for grinding steel welds away.

They appear to be well made and ready for the long run. I've chucked up two of them and they really cut the steel I was working on and didn't show signs of wear. Box is plastic but well executed as all the burrs actually fit and are retained in their slots. I've had many a crap metal box that was far worse than this box.

Nice quality

Worst carbide bits ever. I had such high expectations. I’m so disappointed. They all broke first use. And no I didn’t abuse them. I followed their directions to a tee. Garbage. Don’t waste your money.