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 (Hook/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 Hook/Loop backing) 1/3 sheet Hook/Loop Sanding paper This listing is for a 50 pack of sandpaper 40 grit SIZES OF THE SANDPAPER 93mm x 190mm GRIT OF THE SANDPAPER 50 x 40 Grit