172PCS 1/8-inch Shank Power Rotary Tool Accessories Kit- Includes Carving Bits, Drill Bits, Sanding Drums and Discs, Grinding Stones, Buffing Wheels, Cutting Discs and Polishing Compound

I bought them to cut holes in tiles. Works great. Its a slow process, but it gets the job done. So far, I've cut 28" total straight, & 7 - 1" holes. The bits are sharp and no damages so far.

I use these for small stone cutting and these are perfect. So many different pieces in different sizes. So many back up blades and these things cut through stones like butter, with water of course (please use water to protect your diamond drill bits it also reduces the amount of powder you could potentially breathe in or get in your eyes.) The case/packaging is a bit frustrating and not for long term storage I would buy a small tack box to keep them in. Definitely recommend for any project.

They wear out but not as quickly as some alternatives. I’ve been using them for stonework so it depends on what I’m cutting or shaping. Obviously the hardness of the stone makes all the difference. Overall, though it was a good value for money.

I did a small project where I had about 20 pieces of small stone I had to cut. Not needing a wet saw for such a small project, I ordered and tried these. They worked great! I attached them to my drill, measured and was patient as it cut where I needed it too. Would recommend!

Burnout

I haven't yet

Works good cutting glass with a dremel.

I liked the variety of bits , I didn’t like that it doesn’t have a storage box of any kind