Accelerate your metalworking process with RADNOR Ceramic Type 27 Flap Discs. Built for aggressive medium stock removal, effortless blending, and flawless finishing, these highly durable ceramic discs drastically cut down workflow times. Featuring a robust fiberglass backing, they are offered in 4 1/2" and 7" sizes, are compatible with 7/8" and 5/8" - 11" arbors, and come in versatile 40, 60, and 80 grit sizes.