Scotch-Brite™ Surface Conditioning Flap Discs are designed using strips of surface conditioning material on a rigid backing plate. Our discs can be used on an angle grinder.Use Scotch-Brite™ Surface Conditioning Flap Discs on angle grinders. Our discs offer more resilience and a longer life than standard discs. They’re made using strips of surface conditioning material on a rigid backing plate. Open web material runs cool and resists loading, which is useful for prolonged use. These discs are conformable, conditioning surfaces without gouging, undercutting or damaging the base material.