Use this double knee brace to support two knee braces from a single TAB or 1.25" lag bolt or in the construction of a tri-beam using 4x6 treated lumber. Using only one tree attachment point reduces impact on the tree and decreases installation time. 1/4" steel plates Bracket surrounds the mounting pipe which greatly increases bracket strength vs. industry standard tough, corrosion resistant, textured powdercoat finish includes (4) 5/8"x5" hot dipped galvanized carriage bolts, washers, lock washers, and nuts Does NOT include the TAB or 1.25" lag bolt