The Tube Brush, Steel is built for heavy-duty cleaning of bores, tubing, and fittings. Its flexible stem follows light curves, while dense steel bristles cut through residue and buildup along walls and corners to prepare surfaces for assembly. Compatible with common cleaners and degreasers, it rinses quickly between passes for repeat use. With firm, balanced stiffness, it removes tough debris effectively while maintaining control. Durable enough for routine maintenance, this brush is a reliable choice for demanding shop or jobsite applications.