Routunda Series, Chrome Plated finish 4" x 2" glass to glass mount operable transom pivoting clip. These beveled edge clips are designed to rotate a movable transom glass off an inline fixed glass panel for frameless shower applications. Operable transom glass allows for the release of steam from the shower enclosure. Solid Brass construction. For use with 3/8" - 1/2" Tempered Safety Glass. Clamp must be centered on the transom glass to achieve balanced movement. Maximum movable transom glass size is 16" x 30". Requires 3/4" Diameter hole in the fixes panel and a 3/4" Diameter hole and notch in the transom glass. 3 Year Warranty.