Professional tool for commercial or occasional use 90mm sanding triangle Designed for the automotive refinishing industry Manufactured from Aluminium oxide abrasive for strength and durability This disc is backed with Hook/Loop cloth for easy installation Added convenience of a hook and loop quick change system Pre punched for use on hand held sanders with integral dust extraction system 6 hole design eliminates clogging and aids dust extraction 6 hole design also reduces the amount of dust which means it can no longer collect in lumps on the abrasive surface Eliminating the problem of dust clogging which causes defects in the sanding surface Triangular design allows for access into tight corners and other such areas Pack of 50 discs 120 grit so quite a fine grit suitable for all materials including metal / wood / Plastic etc SET INCLUDES THE FOLLOWING 50 x 90mm Sanding Triangular discs 120 grit