Use this single knee brace to support a knee brace from a single 1" lag bolt using 4x6 treated lumber. Be sure to select the correct size pipe for the attachment method you'll be using. 1.25" Pipe = TAB or 1.25" Lag bolt 1" Pipe = 1" Lag bolt ONLY 1/4" steel plates tough, corrosion resistant, textured powdercoat finish includes (2) 5/8"x5" hot dipped galvanized carriage bolts, washers, lock washers, and nuts Does NOT include the TAB or lag bolts