Weiler Roughneck Max 4 in stringer bead wheels deliver unmatched weld cleaning performance by maximizing life, efficiency and consistency. The 4 in 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. Wider face wheels can be used for cleaning filler and cap passes as well as for other surface prep and cleaning applications. Stronger, sharper wire delivers consistency and performance you can count on. The operator can apply less pressure to clean, letting the wire do the work. Narrow face brushes are suitable for cleaning root and hot passes and reaching into corners. Improved feel and comfort during use makes brush operation effortless. Unmatched cleaning power compared to competitors.