This concrete diamond grinding cup wheel set includes two 115 mm wheels designed for use with standard 4-1/2 in. angle grinders. One wheel uses a turbo style segment and the other uses a double row pattern to deliver aggressive material removal while maintaining control over the cut. Each wheel features a 22 mm arbor hole and a 5 mm diamond segment thickness, enabling both dry and wet grinding on concrete, granite, stone, tile, marble and cementitious surfaces. The steel body is heat treated for durability, and the diamonds are bonded to deliver consistent performance across a range of masonry applications. An exhaust or cooling feature helps manage heat buildup during operation, which can reduce wear and extend wheel life in longer jobs. Reducing rings are included to adapt the arbor from 22 mm to smaller sizes, improving compatibility with different angle grinders. The set is designed for quick tool changes and broad compatibility with common 4-1/2 in. grinders, allowing users to tackle removal of thinset, smoothing of rough patches, and preparation of joints before setting new materials. As with any grinding work, follow safety protocols, use appropriate PPE, and manage dust and debris to protect the work area and operator.