Review on 🪚 Wood Carving Discs: Replacement Chain & Grinding Wheel for Angle Grinder Attachment - DoubleSaw Teeth Shaper, 5/8" Inner Diameter - Ideal for Wood Cutting (4" or 4-1/2") - Includes Cut Resistant Gloves by Chris Nastanovich

These wheels look and feel surprisingly high quality with very sharp teeth. Unfortunately they made the top hole of the chuck too small to fit a standard Ryobi grinder chuck. I've never had this problem with any other grinding disc/wheel, so I'm not sure why this hole (chrome half-dome grinding wheel) is so small. My Ryobi cartridge is 40mm wide or about 1-11/16 inches. The feed opening is approximately 37.5mm or 1.5 inches. Since I bought it as a set and have to send it back, I didn't try the sprocket. It's wide enough at the top that I think a standard cartridge would work with it. If you have a smaller cartridge I suspect this will be a good buy for you. Edit: Too clear, the problem is the outer diameter of the collet/collar hole. The inside diameter appears to be normal, but the ferrule/ring does not fit into the space provided on the burr (see Ryobi ferrule/ring dimensions versus burr blades in the images shown).