Driver head for st357 turbo nozzles 1/4" female. A stainless steel driver head for turbo nozzles. This is a great accessory which fits between a turbo nozzle and sewer hose. Its six powerful rear facing nozzles help to propel the turbo nozzle forward, while the turbo nozzle can cut through roots, dirt and fat deposits with its conical jet. A great combination for drain unblocking using high pressure water jetting techniques. Any business offering drain or sewer cleaning services should have this as part of their kit. When using this product its important to ensure the correct sized nozzle is used, as the majority of the water needs to be blasting to the rear to ensure the proper required propulsion is achieved.