Bosch FD2945040 4-1/2 In. 7/8 In. Arbor Type 29 40 Grit Blending/Grinding Abrasive Wheel Designed for use with small angle grinders Type 29 flexible wheel and flap disc For blending and stock removal on uneven surfaces Best used at a 10-degree angle Aluminum zirconium grain can be used for rugged stock removal