The flanged tube and hardware covers the rough-in hole and rough pipes well as supports and straightens the pipe. The included wall anchors secure the unit to the wall and help to correct drooping or angled pipe stub outs that can occur, especially with PEX. The chrome finish tube and twist lock flange with hidden fastener design complete a professional installation. Can be used with 1/2 In. PEX, copper or CPVC. Anchors and screws included.