This Base Plate is the perfect square indoor base solution. It is recommended for use on flat surfaces with Bowflags® sizes Large and XLarge as well as the Telescopic Flagpole. The base is made of steel and is approximately 40 lbs. The Pole Connector is needed to attach the Telescopic Flagpole Pole Set to the Base Plate. You also have the option of L Stakes or the Weight Bag Large for added stability if used outdoors.