SINGLETWIST^® end brushes are produced with a single, twisted wire knot, designed especially for brushing internal corners and edges where access is limited. Wire filament is with a left handed twist of the brush rotation, which prevents the knots from unravelling during use. The strength of the knotted wire allows adequate pressure to be applied to quickly remove rust, scale, corrosion, etc. with ease from these formerly troublesome areas. The stainless steel version includes a coated cup that prevents the workpiece from being scratched or marked.