Take total control of your blending needs with RADNOR Ceramic Type 27 Trimmable Flap Discs. Delivering exceptional medium stock removal, rapid blending, and fine finishing, these discs are uniquely designed with a trimmable plastic backing that lets you maximize the abrasive life of every flap. Available in a 4 1/2" size and 40, 60, and 80 grit options, they securely mount to 7/8" and 5/8" - 11" arbors.