60 Grit Diamond Grinding Bits Compatible with Dremel Rotary Tool, 20 Pcs Stone Carving Diamond Drill Bits with 1/8 Inch Shank for Stone Carving, DIY Grinding, Polishing, Engraving

Have been using product to carve detail in quarts. Last as long as anything I've purchased from big box stores, and this set cost as much as one individual bit from those stores. Serves their purpose well.

Great value for your money (I paid around $13). I bought these to grind down ceramic glaze drips, and these bits work well. I was able to grind down about 1/2" of glaze in a couple minutes. The bit was worn out by then though. Luckily there are a lot more in the pack. The texture these leave is pretty rough obviously, so it helps to sand down your ceramic with a finer grit of sandpaper after to get a super smooth bottom.

For the price I expected poor performance but they worked much better than thought they would. And as a bonus they were delivered on time.

So these bits work great, although I initially had issues with them fitting in the collet of my rotary tool (non-dremel). The shafts were too thin (1/8") and I wasn't able to tighten the collet down quite enough to hold them. Luckily, I have an older Dremel single-speed lying around, and found the collet from that worked fine.Any other bits I have bought that say "will fit Dremel" have always fit my rotary tool, so I'm not sure why these didn't.

This was my first time purchasing these Dremel Diamond bits and they last longer than I expected. The variety available in this set is awesome. They are easy to use and great value for the money!

I used this to engrave in to cement and it worked perfect it did not seem to eat the bits up that much and I know that I will be able to use these many more times in the future

I had to grind some hardened steel and these bits effortless did the job. Take your time and let the bits do the work for you. Apply minimal pressure and do not use any sort of lubricant. Spin at the fastest speed that you can. Depending on the hardness of the piece that you are grinding you may need to use more than one. I ended up only using two but every job is different. I highly recommend these bit and will definitely be buying another set or sets to give as gifts. Happy grinding!

Estas brocas de diamante me han resultado excelentes. Las uso para desoxidar metal y de verdad que me han sido útiles.Hay con diferentes formas, pero las más útiles son las cónicas porque me permiten llegar a lugares de difícil acceso. La durabilidad ha resultado ser mejor de lo que esperaba. Despues de muchos usos todavía siguen siendo eficientes. Además la estructura se mantiene intacta. Apenas se percibe un poco de desgaste.