Diamond Grinding Wheel for Thick Coating Removal The Alpha® Spike Disc is a diamond-clustered grinding wheel engineered to remove thick epoxy, urethane, glue, and adhesive coatings. Multiple layers of high-quality diamond grit are vacuum-brazed into clustered beads, providing fast material removal and consistent cutting performance throughout the life of the disc. Removes Coatings Without Grinding the Concrete Unlike an aggressive PCD cup wheel or conventional concrete grinding disc, the Spike Disc targets the coating without damaging the underlying concrete surface. Preserving the concrete helps reduce the need for a separate grinding step after the coating has been removed. Open-Mesh Grinding Disc Reduces Clogging and Heat The open-mesh diamond layout allows removed coating material to clear the working surface, reducing clogging and heat buildup. This open construction also helps prevent excessive heat from burning metal surfaces. A lightweight sandwiched body with rubber cushioning reduces noise and vibration during operation. Grinding Wheel for Concrete, Steel, Wood and Composites The Spike Disc can remove coatings from concrete, steel, wood, Glass Fiber Reinforced Polymer (GFRP), and Carbon Fiber Reinforced Polymer (CFRP). It is available in 4-1/2", 5", and 7" diameters with 35 or 50 grit. The 5/8"-11 threaded hub allows the grinder wheel to mount directly to compatible angle grinders. It can also be paired with the Alpha Ecoguard G and a compatible vacuum for a virtually dust-free coating removal setup.