Lessmann Knot Cup Brush 100 x M14 x 25 x 0.50 Stainless Wire LES486817 Knot Cup Brushes are for heavy-duty use for the preparing of metal surfaces before painting, and the removal of slag, rust, scale or concrete waste.Lessmann knotted brushes are filled with a special steel wire of high tensile strength in order to meet the demands of this type of brush. Stability bridle fitted.Diameter. 100mm.Bore. M14.Wire Gauge. 0.50.Wire Type. Stainless.Max. R.P.M. 8,500. LES486817