The RM Suttner ST154 500 Bar twin lance is another pressure washing accessory used for cleaning tasks that require different spray patterns and pressures. Like the ST53, the ST54 twin lance enables the user to have two nozzles mounted on a single lance, but with different configurations and purposes. The first nozzle is usually a high-pressure nozzle used for blasting away dirt and grime, while the second nozzle is designed for the application of chemicals or detergents at low pressure