10 Pcs 3/32'' Shank Expanding Hole Diamond Burr (0.5mm - 4mm)

Good gear.

Does not fit my Dremel 2 speed which is only 2 years old. I did however find they did not snap easy, and do not heat up! I used some on my drill instead. Very durable. The diamond content above carbon content was more than sufficient to drill right through 1/8" of ceramic alumina without heating up the water pool ! The bit did not even get warm! The largest bit made a hole before I knew it. Beware of using these on drills, since they could mount off-center, and the vibration can break the bit tip. Tinfoil can be used to correct the center of rotation if you're patient.

I'm writing this review mostly because I'm tired of reading reviews that state "won't work with Dremel" on various bits/burs sold on Amazon. These have smaller shafts than the traditional Dremel bits, which means you will use a different collet than the one Dremel tools usually have installed from the factory. Depending on your tool, you should have gotten more than one collet. Look at the accessories that came when you purchased your tool. If nothing else a quick Google search for Dremel collet will educate you on what needs to be done to make these bits work with your "Dremel" tool. As for these things... They are good you get a nice selection of sizes. What I really like is the smaller diameter bits .5 & .8 aren't blunt cut at the tip they come to a nice point. They are delicate don't try cutting through metal... Also if you wet them before each use it helps extend the life of the diamond coating. They aren't meant to last forever. They are best for detail work.... I would like to by the smaller ones in bulk. Unfortunately when looking to purchase these specific shapes in bulk I've had no success....

Excellent product. The seller is excellent, I can recommend.

Rather small bits

I wanted to poke holes in sea shells for my kids to string them on necklaces. worked good for that, just dont press too hard and let the bit do the work, keep it wet while drilling.

work well, good price, fast delivery!

I needed these for my Dremel tool to make shell jewelry. I needed a very tiny point to drill through really delicate shells to make earrings out of them! These work perfectly for that! I'm like a kid in a candy shop now! ;) Arrived super fast also! Thank you!

llegaron antes de tiempo y en excelente estado. son de buena calidad y a buen precio!