ThunderHead has leading edge flow design and delivers shower satisfaction. Plus the amazing swivel arm with four self-locking joints gives unlimited positioning. Awesome, drenching power shower experience from ninety spray jets that delivers a spa-like shower that soothes those aching joints and muscles. Also washes away shampoo easily and thoroughly. Full spray pattern with complete body coverage and no annoying holes or gaps in the spray. A whopping 9 inch diameter for wide track, shoulder-to-shoulder coverage. ThunderHead also has design features built in to overcome low water pressure conditions. Easy cleaning. Just flick hard water scale from the soft spray jets in seconds. This unit never clogs up. You never have to soak the showerhead in toxic chemicals overnight. Multiple positions from the incredible acrobatic extension arm with its four swiveling joints which pivot into a variety of self-locking positions. Easily installed and tightened onto the shower pipe by hand. No tools are needed. High polish finish and sleek high tech design fits in with all decors.