Our all new super heavy duty solid brass double locking extension arm. Each arm is 9" long for a total of 18" of extension. Adjust your shower head up, down or out. Perfect for everyone in the family from tallest to the shortest. Since these arms lock into place, they must be loosened and re-tightened every time you move the shower head up or down. This should be done with the water turned off. We do not recommend this extension arm except for heavy shower heads or in cases where you will not be adjusting the height of the shower often. To adjust the heights of the extension arm you must: 1. Turn off water 2. Loosen wingnut approximately 1/2 turn 3. Move extension arm to desired height, re-tighten wingnut. All three joints are locking joints. When you raise or lower the shower head, this will change the angle that the shower head sprays. You must also loosen the 2nd winghut, adjust the angle of the shower head and then re-tighten the wingnut.