One Wheel, Three Grits, Total Efficiency.Introducing the Revolutionary 3-in-1 RIDGID Cup Wheel - the only grinding solution you need. Engineered with interchangeable heads, this versatile tool combines the functionality of three grinding cup wheels in one lightweight, operator-friendly design. With coarse (30 grit) for aggressive removal, medium (50 grit) for smoothing, and fine (70 grit) for finishing, it's built to handle every phase of surface prep with ease. Whether you're cutting or grinding metal, concrete, tile, stone, epoxy coatings, or even wood, this cup wheel delivers fast, precise results. It features a 7/8" arbor to fit most standard angle grinders for easy, secure attachment. Ideal for DIYers and small contractors, it's designed for maximum productivity across a wide range of materials.