About the Chief CMA360The Chief CMA360 I-Beam Clamp lets you adapt a 1-1/2" NPT column to an I-beam truss that is 2-5/6 to 12" wide. The CMA360 is UL listed and intended for use with Chief CMA Series accessories and RPA Series mounts.Chief CMA360 IncludesChief CMA360 I-Beam Clamp5/32" Hex Key1/4" Hex KeyInstallation InstructionsSpecificationsCertifications:TÜV Certified, UL ListedColor:BlackOverall Dimensions (H x W x D):5.5" x 14.2" x 6.2" (138 x 360 x 157 mm)Shipping Weight:11.00lbsWeight Capacity:250 lbs (113.4 kg)