4-1/2" x 1/8" x 7/8" Arbor
Concrete/Masonry Depressed Center WheelDouble Reinforced With Industrial Grit & Glue For Increased Life & DurabilitySuperior Friability Allows Wheel To Break Down Quickly Consistently Exposing New Grain For Increased Sharpness & Longer LifeFor Low Angle & Vertical GrindingBulk.