Antenna boom Truss Bracket Assembly That's all you need to support your  Yagi antenna Boom Brackets are high strength aluminum boom brackets (0.25” L-profile), with a zinc plated 5/16 U-bolt with saddle and galvanized thimble for the support cable. (2pc goes on the each side of the boom), designed for 2 in. booms. These boom brackets are designed to attach near the ends of a 2 in. boom. They allow for the attachment of truss support cables from these brackets to the truss bracket, to support a long boom Yagi beam antenna. Central truss plate bracket (goes on the mast) aluminum 0.25” L-profile with zinc plated u-bolt designed for 2” mast and 2 hook and eye turnbuckle. List of materials: 3 x Aluminum L-profile 0.25 x 1.5” x 3.25” 3 x U-bolts with saddle for 2” pipe 2 x Galvanized Thimble 3/32” – 1/8” 2 x Turnbuckle, Zinc plated with aluminum body Hook and Eye        Working load limit 90lbs