Hand-held diamond grinding block ：An essential tool for manual corner grinding and edge detailing. Designed to reach blind spots that floor grinders and angle grinders cannot access, such as wall corners, toilet bases, stair edges, and curved stone surfaces. The 4-screw resin base ensures stable, high-pressure manual grinding without slipping or bending, allowing for efficient removal of cement residues, sharp edges, and uneven burrs on marble, granite, ceramic tiles, and concrete.