Installation of ExtensionThe extension connector has two mounting angles one is suitable fort and ground one is suitable fort and wall surface‎.‎The extension joint can also be used with other extended telescopic rads‎.‎ Other requirements of the telescopic rod joint for square thread of American Standard other telescopic rods head to be purchased‎.‎ The 3‎-5 meters of telescopic rod be used with it‎.‎ Brush Head ReplacementBrush head installation ‎- Please grasp the handle of the body‎,‎ and let the rotating head point to the slot of the brush and press down‎.‎Brush Head Uninstallation ‎- Please grasp the handle of the body‎,‎ the other hand hold or grab the brush head‎,‎ pulling out the rotating head from clockwise direction