Sirven muy bien aun que yo creo que deberan hacerlas ms largas y angostas

I bought these to clean up the cast iron intake and exhaust ports on a 1937 Harley flathead I'm building and they worked great, took off a ton of metal on two cylinders (valves are in the cylinders) and they still seem sharp and are working good.

For the money, these are amazing!

Good value. Do the job right.

The tool set came in the nice package. I used them in aluminum and wood. They cut good, higher RPM in tool setting gives much better control in trim work. Practice on something else, before, working on real part.

have not worked these very hard- but great initial performance. Would buy these again as needed.

5.0 out of 5 stars

This was fantastic for the first 2 minutes and then I noticed after that (on pine) it stopped removing material and started burning. Then it knicked a corner and instead of tearing out a chunk of wood like it should've, it bent in half. material this cheap is dangerous when it's spinning at a few thousand rpm's. Just needed these for 1 project and didn't wanna spend a lot of money on bits but if you plan to use these often, buy something better.

Thank you

Good sized bits for a dremil

They are great for small jobs ,and shape and sizes of the rotary get in to small spaces ....

Shank is kinda small but none have broke yet

I used the bits for removing grout. They did a great jo.b. When I was done they still looked like new. Nice variety.

Longevity, unknown, used them once.

I use for doorknob holes and mostly drywall can grind down without cause over cracking help keep from destroying the wall

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.

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

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.

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