General description Silverline Hook & Loop Discs are designed for general purpose sanding, featuring aluminium oxide material for effective performance. These discs come in a pack of 10 and are specifically designed with punched holes to facilitate dust extraction during use. Technical specifications Diameter: 225mm Grit: 120 Material: Aluminium oxide Punched holes: 8 for dust extraction Compatibility and accessories Compatible with all 225mm hook and loop backing pads Compatible with 225mm wall sanders