The DEWALT DWAFV84518 FLEXVOLT 4-1/2" x 1/8" x 7/8" T27 Grinding Wheels are engineered to maximize runtime. These wheels feature high performance ceramic grains that stay sharp for fast, efficient cuts, along with high density grain concentration for fast action and low heat build-up. 7/8" Arbor. For use in cordless and corded tools. DEWALT FLEXVOLT high efficiency accessories are engineered to maximize runtime. Includes (1) Grinding Wheel.