Weiler 4″ Polyflex Encapsulated Narrow Face Crimped Wire Wheel Brush features an encapsulation that gradually wears away to expose a consistent short trim for higher aggression, controlled brushing action and longer life. 5/8″-11 nut for use on straight grinders, bench/pedestal grinders and buffing lathes. Featuring Weiler’s solid ring construction, these radial brushes are available in heat-treated steel, type 302 stainless steel and brass wire for use in a wide variety of applications. Feature an encapsulation that gradually wears away to expose a consistent short trim for higher aggression, controlled brushing action and longer life. Ideal for use on straight grinders and stationary machines such as bench or pedestal grinders and buffing lathes. Featuring Weiler’s solid ring construction, these radial brushes are available in heat-treated steel, type 302 stainless steel and brass wire for use in a wide variety of applications. 7/16 in thickness at face plate. .