Three types of brushes: stainless steel, brass, nylon; all with 1/4" quick chuck shanks for power tool use Each type of brush available in 6 sizes: 9, 11, 13, 15, 17, 19mm Set includes a 150mm (6 inch) extension with quick chuck for power tool use Soft grip handle for comfortable hand use Supplied in a canvas fold up case Replaceable Brush Sets available, please see Laser Part Nos 1846 (nylon), 1847 (brass), 1848 (stainless steel) All in packs of 6 brushes