Ground Anchors or Concrete Anchors are also recommended to help protect the building from wind damage Includes 4 corkscrew type anchors, 4 corner gussets and 4 locking washers. Fits steel buildings up to 10x13 ft. It is recommended that larger buildings be installed on a concrete pad and anchored with the concrete anchor kit. Great for anchoring small and slope roof buildings. . Arrow Sheds;Arrowsheds;Arrowshed The finest Shed Accessories. Made by Arrow Sheds