This Bosch X-LOCK Cleaning Disc is designed for rapid removal of rust, paint, and oxide layers from metal surfaces. It is also effective for cleaning lime deposits and graffiti from stone, marble, and concrete. The disc features a 3D open-structured fleece with silicon carbide coating that renews its cutting edges for consistent material extraction. It is compatible with all grinders, including those with standard nut and M14 threads, thanks to the keyless X-LOCK system. The disc is supported by a fiberglass carrier plate. Technical Specification: Diameter: 115mm, Bore diameter: 22.23mm.