The Faithfull Zirconia Abrasive Jumbo Flap Discs are designed for use on angle grinders. Jumbo discs contain up to 40% more abrasive than standard flap discs. Manufactured from long lasting Zirconia Alumina and resin bonded for extra strength. Suitable for use on wood, metal, plastic and stainless steel. The slightly conical shape is ideal for grinding at 15–25 degree angles on contoured surfaces.