1/8 Shank Diamond Grinding Burr Drill Bit Ball Shape Diamond Rotary Bit,15pcs 36# Course Burrs Set Mounted Points Bit Universal Fitment Rotary Tool for Stone Carving, DIY,Polishing, Engraving

I use this product for mirror etching and stone carving and it works great for both. Would buy again!

These are fairly well manufactured burrs for rotary tools. I tinker quite a bit, and they have come in handy on multiple occasions in a brief time period.In some cases a finer grit would be preferable as these are rather course, near 80 to 60 grit.

This is a simple item that will do what it's intended to do. You won't pass these down to your grand kids - you'll use em up and dispose of them when they wear out.I like the sizes, and the amount you get. Will get again if I use these up.

I was initially elated at the price of this item. I told myself not to get my hopes up because as inexpensive as they are, they have to run down quickly or something. So far, I have found them to be very durable and work quickly. They fit easily in my Dremel and they don't work their way out or slip. They are evenly coarsed, and overall are an excellent choice in comparison to many others I have tried. I use them to find tune sheet metal when I have to cut it to form random industrial pieces that have been discontinued by a manufacturer. Again, the price is outstanding and the product you get is well worth every cent.

I’m really pleased with the wide variety of sizes of the burrs in the set, though there isn’t an extra small one for superfine details. I used them to carve a tagua nut, which are somewhere between dense wood and stone in hardness, in other words REALLY hard, and these burrs drilled into the material with ease, leaving smooth rounded channels. I was using a tool that’s basically a cheaper knockoff of a Dremel tool and the burrs fit it perfectly. I wasn’t really thinking about it when I ordered them, but I think the next thing I will try with them is cutting drainage holes into ceramic or stoneware flower pots that don’t have drainage now. They have a tendency to roll across a surface instead of digging in if you don’t have a solid grip on the tool, but that’s true of pretty much every rotary tool bit.

I was very surprised to see how well these work on plastic and wood, although I usually use stuff like this on steel so we’ll see how they perform.Pretty versatile and durable and the diamond cutting surface does not come off easily. I think these are a decent value if you think these could help with a project.

I mounted the largest ball and set to grinding some mild steel. I worked the tool with a modest amount of pressure with occasional breaks to cool off the ball. With 15 minutes of use, I could see no difference between the ball I was using and the two unused pieces. The only giveaway was that one was slightly warm. I think the only real enemy to these cutting balls is excessive heat. The actual abrasive seems to be very effective but they have to held in place with some adhesive and I am sure, given enough heat, they would quickly degrade. For light duty and hobby use, I see nothing wrong with these. It's a nice collection of frequently used sizes and the price is very reasonable.

The couple of these I've used so far to touch up rough edges on some ceramic pieces worked great. They're very coarse, so you need a light touch. You'll chew through almost anything quickly with them.But as a first step before doing finer sanding and polishing with diamond pads, they're perfect.

These ball shaped diamond burr sets have a useful 1/8 inch shaft size, and the different sizes have the same shaft size which saves having to swap collets one your grinding tool. They come in different grits, the one I had was 36 but other types are available in different grits.The set I had 15 pieces in 5 different ball sizes. They look very well made.I had an old bit of marble type material lying around and I thought would use it to test each of the burrs. I used a Proxxon drill. I found that the burrs cut into the stone material extremely efficiently without the slightest fuss or bother. The residue after the cutting was just a light powder with no trace of loose diamond grinding material. The burrs seem to take this in their stride and the grinding did not leave them with any ill effects.I can’t fault these burrs. They do what they are supposed to do, they are well made and seem to be good quality. I recommend them.

Review for CBRIGHT Ball Shape Diamond Burr Bit,15pcs 36# Coated Course Burrs Set 1/8inch Shank Diamond Tools Set for Most Rotary Tool GrinderOwning a Dremel multi tool, getting a set of attachments is always welcome. These are tough diamond coated grinding burr designed for use abrasive application such as smoothing rough surfaces or filing down sharp edges in all manner of hard materials. Good for specific use and reasonably priced.