2 arm, 1-1/2 in square3 x 5 x 3/16 in mounting plate attaches with (4) 3/8 in boltsSwing 300 deg in horizontal plane and 210 deg in vertical plane11 ga steel tubing
TPI DKL60VAARM Standard Mounting Arm, For Use With Modular Loading Dock Light, 60 in Arm, Steel