13 Pcs Ball Shape Diamond Grinding Burr

I was worried seeing all the negative reviews but we use these to etch glass with a hart brand rotary tool with no issues. Matter of fact the Dremel bits were leaving "grain" lines on some glass and we used these cheap bits to even it out. We have used them, I feel, just as much as Dremel bits and while they do eventually wear out, it's no quicker than the Dremel ones. We did have to change to a smaller collet but that wasn't a big deal at all. I think these are well worth the money.

I needed for glass etching and shaft was too narrow and too long. I’m not sure about what these different heads would work on.

The shape/sizes are great but they are a bit dull.

I would avoid these at all costs. Yes the price point might make you think oh yes, but first use will make you go Oh no! As you can see from the pic 10 mins of use and 1st one broke completely, and second one is on its way out. Over the last few days every bit is on the verge of breaking! Just a waste of money and time. The coating doesn’t even stay on long enough for you to get any decent work done. Garbage junk trash …. Best three words that describe these bits. 2nd set from same seller (arrived the same day) and same issues just trash!

Son pequeñas ,y para mí trabajo funcionan muy bien ,espero que duren mucho tiempo.

Undersized shaft to small for 1:8 and to big foot 3/16)

Shank is too small

Please save money. This diamond burr does NOT last even for 5 minutes use. I was to upset to even return as it scratched the one I was working on. The diamond head was completely gosh the first 2 minutes. Is there a quality inspection here in Amazon?

quality burrs cant go wrong