3 Pieces 4 Inch Concrete Stone Ceramic Turbo Diamond Grinding Cup Wheel,12 Segs Heavy Duty Angle Grinder Wheels for Angle Grinder (Yellow)

Works great. Remember to buy a dust shroud if you’re grinding indoors. This works so well you will fill a 1000sq ft with dust in 10 minutes if you don’t......I did. Ugh.

I bought two diamond grinding cup, only received one, i requested for the second i have not received a response

If you have a low power grinder and arent in a hurry, these might save you some money. If you have a decently powered grinder and are willing to pay a bit more to get the job done faster with less work, there are better options. I had a project to grind down a concrete door sill. I had to remove between 1/8 to 3/8 of concrete over a 8 x 6 area twice. I started with a similar grinding wheel from Harbor Freight (Bauer 4 In. Diamond Turbo Cup Wheel). I had an assistant running water over the work area, which kept the dust down and the wheel cool, but made a muddy mess to clean up. I completed about 90% of the job and used maybe 3/4 of the grinding wheel, but it became unbalanced which was made worse by the bearing on the angle grinder getting wobbly. I got another cheap angle 4.3A grinder from Harbor Freight (HF), but decided to try these JIAKAI grinding wheels since they cost $10 for two instead of $30 for one at HF. When I started using these they seemed to be cutting much slower than the HF one had. I tried the HF one again (which didnt shake as bad with a good bearing on my new grinder) and confirmed that it was cutting a lot faster. Comparing the surface of the wheels after grinding for a while, it appears that the JIAKAI wheel has fewer diamonds embedded in the steel, and they appear to be smaller. What I did find was that with the HF wheel, since it bites in more and removes material faster, it takes more power and causes the grinder to heat up rapidly. I would spend more than half of the time with the grinder off sucking air through it with a shop vac to cool it off. With the JIAKAI wheel, it doesnt take nearly as much power so I didnt have problems overheating the grinder. I didnt run continuously since I would pause to examine my work, but I didnt have to take breaks specifically to cool it down. Of course it was more tiring because I spent more time actually grinding. I finished up the job with the JIAKAI wheel since I figured the vibration and overheating might wear out my new grinder, and it worked okay. Im estimating that I used about 25% of one of the wheels to finish the last 10% of the job, so Id guess that one HF wheel would do as much grinding as between 3 and 6 of the JIAKAI wheels, so with the much cheaper price, the JIAKAI wheels may be more economical (not counting labor). So if I was going to do this project again from scratch, Id seriously consider buying a more powerful grinder that could handle the harbor freight wheel. It would have been much more tiring doing the whole thing with the JIAKAI wheel, but if I eventually use these two up on small projects and have another small grinding project, I might get another set. Other observations: The JIAKAI wheels gave off an odor that reminded me of burning matches (Sulphur?) that the HF one did not. The flat area in the middle of the JIAKAI wheel was smaller than the nut used to hold it on, so the nut pressed against the angled part of the cup. It seemed to hold it securely anyway, but it wasnt how I expected it to fit.

Works really well, worth every penny. Used it to grind down some floor level that didn’t turn out level.

The blade fit my older Makita 4” angle grinder. Worked fine though we had more cement to remove than anticipated. Ended up buying a larger angle grinder but these blades are a great value for the price.

I got a two pack of these the first one one of the pads on the bottom flew off after two minutes use. Extremely dangerous for anyone in the area. The second one wore out after about five minutes use. I returned these and bought a single pack of a different brand and it has about 30 minutes use on it so far and still works great.

Bought two assuming the would eventually wear. These things are worthless, took so much pressure just to grind down the little amount of concrete. Returned both and bought one from home depot which was significantly more expensive, but what a night and day difference. You really are going to get what you pay for with this product. I would avoid it if I was you.

I got a two pack of these the first one one of the pads on the bottom flew off after two minutes use. Extremely dangerous for anyone in the area. The second one wore out after about five minutes use. I returned these and bought a single pack of a different brand and it has about 30 minutes use on it so far and still works great.

I needed to remove a strip of concrete for a screen door opening. I took off about 1/8 all the way across and had plenty of life left on the wheel.

Good product