Wonder Showers Designer Series Combo Sets help keep water in the bathtub and not on the bathroom floor. Wonder Showers Dual Extension Arms actually lets you start the water flow from showers in the center of the showering area.? In reality the water flow from the shower begins 25 inches away from the wall and more towards the showers middle area. By pointing the waters spray from the Wonder Showerhead straight down into the bathtubs center area and completely away from the main locations for the shower to leak water from and to our bathroom floors. (Leaks occur around shower curtain edges between the front and back walls area). Wonder Shower Dual Extension Arms allow you to essentially center the waters spray to the bathtubs central point.? This helps prevent water from escaping or leaking onto the bathroom floor from around the shower curtain edges near the front and back walls.