Weiler Roughneck Max 4 inch stringer bead wheels deliver unmatched weld cleaning performance by maximizing life, efficiency and consistency. The 4 inch brush is recommended for cleaning root pass welds, surface prep and other cleaning applications with a right angle grinder. The standard for high performance weld cleaning brushes. Narrow face brushes are suitable for cleaning root and hot passes and reaching into corners. Wider face wheels can be used for cleaning filler and cap passes as well as for other surface prep and cleaning applications. Improved feel and comfort during use makes brush operation effortless. Stronger, sharper wire delivers consistency and performance you can count on.