Introduction PRODUCT DESCRIPTION Nyalox 2.5″ cup brush assortment. Includes 1 each coarse(gray), medium(orange), and blue(fine) 1/4″ mandrel mounted brushes. Nyalox, the original abrasive nylon brushes have been redesigned to improve performance over a broader range of uses. 3 piece nyalox kit includes 3 nyalox cup brushes 2.5-inch grey coarse 2.5-inch orange medium 2.5-inch blue fine. Key Features: Nylon bristles outlast wire Safer to use color coded grits use on metal wood or masonry/tile 1/4″ hex mandrel for quick changing