The Mega-Truss Tee Clamp is great for holding a 1-1/2" pipe to the end of a truss for holding light fixtures. Sold in pairs and provided with 5/8" x 1-1/4" Hex head bolts to fasten through the standard truss bolt holes. 1/2-13 socket set screw for locking pipe into position. CNC machined from solid 6061T-6 aluminum with 5/8"-11 tpi internal threads for mounting.