100Pcs Set: 10 pieces of 40# 60# 80# 100# 120# 180# 240# 320# 400# 800 grit, the 10 grades can meet almost all your polishing requirements. 【For Size Sanding Discs】Compatible with all brands of sanders. Such as random orbital sanders/Ryobi orbital sander/Makita orbital sander/Vonhaus random orbital sander/Bosch PEX 400 AE sanding discs/Bosch pex 220/Makita 18V sander pads/Makita random orbital sander pads/Makita dbo180z 18v cordless orbital sander discs ect. For Size: 125mm/5 inch diameter, with 8 pre-drilled holes for dust extraction, suitable for Random Orbital Sanders/Sanding/Polishing/Rust Removal. Easy to Change - Durable reverse velcro makes changing sanding discs easier and more convenient; Hook and loop backing for quicker mounting. Multipurpose Sanding Discs: Suitable for grinding polishing wood, jewelry, glass, stone, car, machinery, metal, non-metal, rubber, leather, plastic etc. High Quality: Sanding disc is equipped with a thick D-class paper base, made of high quality