Incorporating second set screw set at 90° in vertical barrel, Hollaender® Speed Rail® X series exhibits increased pullout capacity for security and durability in solar panel installations. These slip-on aluminum pipe fittings, available in fixed and adjustable tee fittings, are used with aluminum, galvanized steel, stainless steel, or black iron pipe to build solar panel racking systems. Versatility enables construction of support structures anywhere solar panel needs to be installed.