SAITLAM - Flap Disc - Flap Disc (flat shape) - Available in 2A aluminum oxide, 3A aluminum oxide with grinding aid, and Z Aluminum Oxide. Nylon 6/6 backing - a non-scratching, high strength backing resistant to temperature extremes, common chemicals, and solvents. Provides an even - finish ready - surface. Excellent for miter joints, corners, and edges