Premium Material: These 125mm sanding discs are made of alumina abrasive with good wear resistance, anti-static, anti-clogging, provide long-lasting and efficient grinding, making grinding easier. Easy to Use: The hook-and-loop backing is quick to install and comes pre-punched with 8 holes for dust removal, making it easy to install and remove, just attach the round sanding pad to the machine. Practical Design: 8 holes are designed for efficient dust extraction. Ideal for most rotary sanders, random track sanders and hand sanders, etc. Wide Applications: Mainly used for polishing furniture, polishing wood, plastic, stone, glass, metal, polishing automobile, etc., or for derusting and stripping paint of non-metallic materials. Package Includes: You will receive 15 pcs x 125 mm/5 inch 400 grit sanding discs with hook and loop.Thick base in design ensures that the sanding discs is not easily crushed during the polishing process.