This stringer bead knotted wire wheel brush features tight, aggressive knots that can fit into recessed areas. It has a diameter of 6 1/2 inches, a maximum RPM of 12,000, a face width of 3/16 inches, and a wire diameter of 0.02 inches. This brush can be mounted with a 5/8"-11 threaded arbor and is made for use with bench and pedestal grinders.