Stone Carving Set Polishing Rotary Tools Diamond Burr Accessories for Carving/Engraving Stone, Rocks, Jewelry, Glass, Ceramics For Rotary Tools

I don't actually know where these were made, but that doesn't matter - they're WELL made. I've used a single bit to rough out a couple cabochons out of agate (which is a very hard mineral!), and it still works like new. There's a visual difference in the used one, but I think that's just the metal coating wearing off the tops of the diamond - it's got a slight greenish cast. I've tried saving a few bucks buying Harbor Freight or cheap-o Chinese imports, and lemme tell ya, do yourself a favor and get these instead. I think the first bit is going to outlast the whole last set I got. Maybe there are better ones out there, but for my money these are in the sweet spot.

Very happy with these bits. Great price and seem to hold up well. I have used other diamond coated bits to grind down stones and even though I use water with them like you are supposed to, the coating came off way too quickly. I did not have that problem with these. I used one of the cylinders to grind down a large chunk of stone, and after I could barely tell it had been used. impressed.

I must say up front that I'm rough on my burs because I cut hard stones at high speeds. So I was pleasantly surprised when it took some really pure, unbanded jasper at 35k RPM for over an hour to finally strip some of the diamond coating off of one of the coarser grit drums. Oh yes, it got hot, even with coolant and frequent breaks. But man! It took off a lot of rock. Not bad at all. I'll probably look to replace these with the same on the future.

Stone Carving Set Polishing Rotary Tools. Works great especially the polishing wheels. The stone carving bits are strong and work great. But differently have to keep them wet or they will burn up to quickly.

This is my first time using a rotary tool, and I've been using these to carve rocks I found on my driveway. The regular bits work fantastic, but the "diamond tipped" bits wore out almost immediately, which leads me to wonder if there's actually diamonds in them. The disc bits work nice too. I'm not sure if I'm supposed to use them to slice rocks, but they work for that. Haven't tried the polishing bits yet. All in all, these were a great start for a beginner like me, and I think I'll get a lot of learning out of them before I have to buy something higher quality.

Great little kit! You get so many usable pieces for carving. The cutting disc got dull sooner than I expected but overall this kit will serve me well. The variety of tip shapes and grits are great but you will need additional tools/tips for a final polish. Comes in a nice case with additional dividers. Arrived super fast. Very pleased with my purchase.

For how cheap this set of bits are I was expecting fake diamond or for them to feel cheaply made, but these work great I’ve had no problem with them. I use them with my Dremel lite and my 200 model.

The bits are affordable and durable. I would give this 5 stars, but one of the grinding bits was barely coated. It even had chunks of coating missing. I did attempt to use the bit in a safe way to see if it would hold up, and the coating chipped away more. I didn't want to have shrapnel shooting out. Had to throw away the bit because it was too dangerous to use. Everything else looks good. If I could change one more thing it would be packaging. All of the bits are stuffed together in a small box. This could damage the bits. Also makes it a pain to get what you need. I don't want to dump out all of the contents every time I need something.

I would recommend this item all day long,it's absolutely awesome value for money and does the job of shaping and grinding out designs in . Works well with all the stones I've tried and I must say hardly any wear n tear. So I'm pleased to say your on a win win with this company in China. I have bought smaller item's in the uk and it's not been as reliable or lasting like the Chinese diamond burr tools from this company.

I'm using this item for dremel, it helps me a lot

I use them to remove stuff from my resin 3d prints and the set is a must have for a rotary tool.

Absolutely love these bits, they're perfect for shaping up rocks and cutting. Just be sure to use them in water!

Works for my project