Zirconium flap discs for descaling, rust removal, weld preparation, weld cleaning and general surface preparation.More durable than normal sanding discs.Display box contains three different levels of abrasion, for assorted applications and finishes.Abrasive flaps are attached to rigid disc with epoxy adhesive - does not require backing pad.Depressed centre discs suitable for electric and air tools.Size/Bore: Ø115/Ø22mm.Contents: 20 x 40G, 20 x 60G, 20 x 80G.Model No. FD115MIXDBAPPLICATION - Zirconium flap discs for descaling, rust removal, weld preparation, weld cleaning and general surface preparation.DURABILITY - More durable than normal sanding discs.CONTENTS - Display box contains three different levels of abrasion, for assorted applications and finishes.MATERIAL - Abrasive flaps are attached to rigid disc with epoxy adhesive - does not require backing pad.DEPRESSED CENTRE - Suitable for electric and air tools.SIZE/BORE - Ø115/Ø22mm.GRIT RATINGS - 20 x 40G, 20 x 60G, 20 x 80G.