Makita's Ultra Premium & Stable Multi-Grit 5" Random Orbital Sanding Paper Disc Set for end-to-end sanding and corrosion removal on wood, metal, and plastic. Proprietary (AO) Aluminum Oxide is used for the inherent properties of strength and hardness, while allowing for longer life combined with versatility for tough industrial applications. (ZS) Zinc Stearate is a white coat used on the abrasive paper that is anti-adhesive and repellent to water, designed to minimize "stickiness" and permit a smooth sanding action even in tough applications on wood, metal, plastic or drywall. 80 Grit size is a coarse size that is ideal for effective surface area removal or tough applications such as: Stripping Paint or Varnish, Rust Removal, Shaping or Leveling Wood.120 Grit size is ideal For a more balanced blend between stripping and finish 240 Grit size is ideal for maximal finish and smoothest look.Makita's 8 Hole Hook & Loop discs are designed to work optimally with Makita and are also fully compatible with All 5" random orbital sanders. Hook and Loop allow for quick removal and replacement of sanding abrasive discs.