Flap discs are plate-shaped sanding discs in which the abrasive is applied to overlapping slats in a circular ring. Pack of 20, each 5 x grain 40/60/80/120, flap discs, suitable for angle grinders/flex, diameter 115 mm, bore: 22.23 mm - for grinding all metals and woods, multiple service life of fibre sanding discs or roughing discs, plates made of fibreglass-reinforced polyester. Flap discs are particularly suitable for coarse and intermediate sanding. They are used on all angle grinders without a support plate. Examples of use are the machining of welds, deburring, rust removal and cast cleaning.