Light Duty Antenna Wall Mounts are used to mount varied mast sizes to most walls. All mounts include both the upper and lower bracket unless otherwise specified. Mounts over 8" include a third compression support leg on the bottom bracket for additional support and stability. Mounts are recommended for use with a mast less than 5 feet long and antennas with 2 square feet or less of surface area. Each mount comes 1/4" x 2" lag screws for mounting to most surfaces.Material included: Pre-galvanized mount, clamps, hardware and lag bolts. Order separately: Mast pipes up to 2-3/8" OD. Design: Knee brace is included