Circular wire brushes, which are produced in various thicknesses by combining segments, are used in cleaning large surfaces. Twist knot types are used for difficult to be cleaned; crimped wire types are used for easier operations. Segments are produced on pipes of 30 ,50, 80, 100 mm in desirable lenght and thickness with hydrolic press machines.
Also, different practices can be achieved by obtaining a low and a high level by means of arranging segments in different diameters. Segments, with diameters of wire from 0,10 mm to 0,80 mm , are produced from steel, stainless steel, brass, oil hardened and tempered steel wire.