The 2.25" Mega-Square XL Half Coupler made from 6061-T6 aluminum billet fastens up to 1100 pounds to 2.25" square tubing. The 2.25" Mega-Square XL Half Coupler has our standard 6061-T6 aluminum wingnut for easy toolless fastening to 2.25" square tubing. The 2.25" Mega-Square XL Half Coupler is provided with a recessed hex pocket to secure the head of the included 1/2"-13tpi by 2" long hex head bolt. Other lengths of 1/2" hex head bolts can easily be utilized to allow any standard length required for fastening to various objects. 1/2" socket head screws will also fit within the hex head pocket allowing fastening to threaded objects when a nut cannot be used.