Professional tool for commercial or occasional use -Aluminium oxide abrasive sheets for longer lasting -Hard wearing heat resistant full synthetic resin bond -Strong D weight paper backing with velour backing -Sanding paper suitable for use on all types of metal and wood on any general sanding applications Punched sheets have holes for sanders using dust extraction -All sheets are designed to be used dry. -Suitable for sanders that retain the sheets with hook and loop system -Each paper has 8 dust holes -Suitable for use on 1/3 sheet orbital sanders (this is the type where the sheet is held in place by the backing pad) -1/3 sheet Sanding paper -This listing is for a 20 pack of sandpaper 40 grit SIZES OF THE SANDPAPER - 93mm x 190mm GRIT OF THE SANDPAPER - 20 x 40 Grit