1.This CSD sanding disc is ideal for removing varnish, rust, subfloor protection, scale, grout and much more. Premium nylon backing with silicon carbide grain. Comes with 6mm chuck (shank) for tightening in drill or cordless screwdriver.2.Dimensions: 100 x 13 x 6mm with 6mm chuck. Compatible with all cordless drills and screwdrivers. Max. Rotation speed : 15,300 rpm.3.Extremely gentle on materials - Unlike other abrasive discs and brushes, you work with a CSD disc very gentle on the material, on metal there is no material removal . Only coatings such as varnishes, scale, tarnish, etc. are removed without removing sound metal.4.Very good for derusting and painting - Do not remove rust with rotating wire brushes in drill or angle grinder In this method, rust mixes/coated with the removal of the wire brush material and is embedded in the sound metal. It then creates a silver/black layer which has an anti-rust effect, but it is not. The new rust is pre-programmed. This layer can no longer be removed!5.Rust treatment with anti-rust gel - For post-treatment of rust, we recommend using the anti-rust gel to completely remove the rust from the pores and poorly accessible places