Horizontal Lifeline Stanchion Beam Clamp for use on I-beams. Clamps to I-beams to provide receiver for end and midpoint HLL stanchions. Fits 6"-28" beam width, 1/2"-2" flange thickness (28 - 71cm width 1.2 - 5cm thick). *This item is sold as part of a complete Engineered Horizontal Lifeline System or as a replacement part for an exisiting system. Required training on this item.