I bought these burrs expecting them to last a couple uses at most because.... I mean come on, look at the price! Since I got this burr set back in 2020 I’ve used the on wood, aluminum, brass, copper, mild steel, spring steel, 1095 high carbon knife steel, and to my amazement all but two still work. I bent one the first week because of using too much force and another got vacuumed up, never to be seen again.I see people complaining about bending them a lot. This is due to a few factors.- bit extended too far from rotary tool.- pressing too hard on tool. (Let the tool do the work, don’t muscle it)- bit made contact with tough material on opposite sides, binding it.- rotary tool is junk and vibrates due to Imbalance.A few things to note, never use these bits without adequate eye protection. I had some cheap glasses and caught a piece of metal that somehow got under the glasses due to my negligence. Also, the chips these burrs send flying are very sharp and very hot. So be careful.

They worked well - happy with what I got for the money.

I bought these for my best friend who rebuilds engines.He was very impressed with them, as was his boss.Will buy again if I need another set.

Here again, for what they are, they are okay. Nothing to brag about, and if these are used hard or on a lot of hard wood, they will dull fairly quickly. Just remember to use the right burr for the job and, the wood ur carving. these particular burrs won’t last if use on actual hard woods like Black Walnut or African Epey.

These bits have longevity I use one to eat away an old bolt that was rusted and striped in a tight spot .worked perfect with the rotory tool !!Glad I purchased these bits made it so easy and fast....

Bang for your buck, using another bits to grind down some stuff and took me forever until i came across this bad boy and took me 20 mins to get stuff done! Well worth it

I used these for grinding softer metals such as aluminum or on my metal miniatures for wargaming. Works great for either.

I've found myself using these almost daily on various jobsites. Sharp, durable, great value, and I will definitely buy again.

The bits fit my Dremel tool and worked as described. No complaints. Good buy.

Some odball dreamal tools that i use every now and then.

Good product

Worked to widen a metal hole with no effort!

bought these to modify a steel weight, cut through like hot butter.

Quite surprised at the quality, and how well they cut. With them being so small I didn't expect them to be as corse as they are. I have only used them on wood but they do a nice job removing material.

Completely satisfied.

Great value for the price. Will recommend to friends.

despite what people say these do not bend that easily i believe people who say the bend to easily are forcing these bits to dig in more than they should. So far they have held up well to me porting my motorized bike engine. I dont really know what else to say except that they are good bits and have held up well so far

Works well for my needs.

Just what I needed. Arrived in good time and in good condition.

So far so good. Haven’t had the product long enough to rate durability or longevity