Improve the performance of your sand discs at an economical price by using this Neon R766 medium grit arbor thread plastic flat flap disc. This disc features a quick trim plastic backing that is flexible and sets the industry standard for trimmability. With alternating zirconia alumina and aluminum oxide flaps that outperform aluminum oxide, and designed for use at a 0 to 15 degree angle on flat surfaces, this Type 27 disc is the perfect choice for medium grit cleaning, detailing and finishing of metalwork projects.