40PCS 4.5" Angle Grinder Wheels Set - Includes 30 Cutting Wheels, 5 Grinding Wheels, 5 Flap Discs, 2 Pairs Gloves & Wrench - Perfect for Metal Cutting, Grinding & Polishing in Construction, Welding & DIY Projects

Can't beat this deal. The quality of these discs are equal to any top brands I've bought no defects no shattering. Wish they had a combo deal for just flapper wheels and grinding discs.ii like that they don't ware out fastYou can find some incredible deals when you purchase a bulk set of cutting or grinding wheels. I used to just to just go to a big box store and pick up a 2 or 3-pack of blades and overpay. These cutting and grinding wheels are just as good quality as the 2-pack blades in the big box stores, but far less expensive.These fit my Dewalt 4 1/2" grinder and even come with an extra wrench (which is nice to have.)Thus far, I have used these to cut steel pipe and PVC as well as grinding down steel. The grinding blades have held up nicely. Definitely a very good bargain as well as good quality.I needed some thin cut-off wheels as I only had a few thick ones on-hand. Recently, I needlessly grounded off a lot of extra metal with a thicker wheel because I didn't have the right one. I don't do lots of metal work, but when you need one—you need it.I was a little reluctant to get these as I had a bad experience with a mass quantity buy of multi-tool blades. They were garbage. That said, I pulled the trigger on these and so far I've been happy. The thin wheels cut well and didn't shred apart. I haven't used each of the various types yet, but if they hold up like the thin ones, I'll be happy.Note they do not have a metal reinforcement ring on both sides of the wheel. The package comes with a tool to change them and two pairs of gloves. I'm not sure why those were included as I obviously I have a changing tool that came with the grinder and I'd definitely pick better gloves!The grinding wheels and cutting wheels are durable and last just as long as big box store items. Great for the shop welding area.A few of these broke within seconds of using on my dewalt grinder.Maybe I got a bad batch, but I can only review what I have.60% of these worked without any issue, but the rest have been brittle and duds. Breaking way too easy while trying to cut auto exhaust piping.