- Exceptional Value: This 40-pack of 60 grit type 27 flap discs, measuring 4 1/2 inches in diameter with a 7/8 inch arbor, meets all your blending, sanding, and finishing needs. - Superior Durability: Crafted from premium zirconia alumina, these flap discs outlast standard aluminum oxide products. They withstand high temperatures and pressures, providing longer life and better performance. - Fast and Efficient Grinding: Featuring robust fiberglass backing plates, these flap discs ensure a strong bond with adhesives, preventing contamination of the working surface. The backing plates effectively absorb vibrations, enhancing stability and achieving an optimal polishing effect. - Versatile Designs: The T27 flap discs have a flat configuration, widely revered for smoothing and blending surfaces. In contrast, the T29 discs have a slight angle, making them ideal for contouring, shaping, and more aggressive grinding tasks. - Practical Applications: 1. Perfect for prepping metal surfaces before painting, ensuring a smooth finish. 2. Suitable for removing weld seams or scaling on steel surfaces effortlessly. 3. Ideal for woodworking projects, providing fine sanding results without damaging the wood. Experience efficient grinding and dependable results with this high-quality set of flap discs.