This double bullhorn tenon adapter mounts directly from 3" square poles to 2-3/8" round poles—no extra adapter needed. Built with 3mm thickened steel, the unique square arm delivers 40% higher torsional strength and extends service life 3x longer. The 180° dual arm fits two LED lights (shoebox, parking, flood, area) for max coverage. Works on wood, steel, or concrete poles in -40°C to 85°C. Includes all hardware. Package: bracket, 2 dust covers, 4 screws.