KBNIAN 3 Sets of 30 Diamond Coated Tip Burrs Drills Bits 3mm Shank 120 Grits Rotary Tool for Wood Porcelain Stone Glass Jewelry Metal Carving Cutting Grinding Engraving Polishing Finishing

So many to choose from, not the best quality, but they will do for me.

But these are tiny tools so of course they do. You get 90 in the pack. They do they job

Totally useless. very sparse coating that just falls off. Don't waste your cash..

Fast delivery and used the diamond bits to take out tile grout, did this no problem only thing was they blunted quickly, but because there was 3 packs there was plenty of bits . Would buy again if needed

Even with huge amounts of cooling and being careful these bits burn out incredibly fast. They may work great on very soft materials, but for a lot of the uses that these would normally thrive, they burn out and die. At the price I cannot say I'm too heartbroken or surprised, but somethingto be wary of.

Superb best kit I’ve had

As a Glass Engraving Artist for over 20 years these have to be the Worst Burr Bits I have ever purchased.Bit after bit was practically bald of diamond burr so would not etch.Out of the 3 packets so far I have only found 5-6 bits that are fit for purpose.Will not be recommending these.Very disappointed customer, if it wasn't for the fact that I recycled the packaging I would have sent these back!

Good value for money, have only used a couple a few things ones so couldn’t say how well they hold up over time but for the price it’s worth it in my opinion