Knot Wheel Brush 100 x 12mm M14 Bore, 0.50 Steel Wire - Lessmann 472.811, The Lessmann Knot Wheel Brushes are for grinders, angle grinders and stationary machines, used in the preparation and re-working of bolt fillet and butt welds. They remove scale, rust, paint, slag, rubber residue and can be used for de-burring. They are filled with a special high tensile strength steel wire in order to meet the exacting requirements during use.This Lessmann Knot Wheel Brush has the following specification: Diameter: 115mm.Width: 14mm.Bore: 22.2mm.Wire Gauge: 0.50.Wire Type: Stainless Steel.Max RPM: 12,500/min. Lessmann 472.811 Knot Wheel Brush 115 x 14mm 22.2mm Bore, 0.5 S/Steel Wire