Stanchion post for clamping to steel I-beams - Fits flange thicknesses form 1/2" to 2 1/4". Fits flange widths from 8" to 22". Simple easy setup! Sold as one (1) each. Can be used as a single tie-off anchor point or as part of an MD Stanchion Post Horizontal Lifeline Fall Protection System. In-line shock absorber to be used as part of either MDK-0060-S - Deploys when a fall occurs to dampen the impact load to MD I-beam or concrete stanchions. Also reduces the bounce of the horizontal cable which minimizes the chance of cascading (when an SRD's brakes lock, unlock, lock, etc). Old as one (1) each. For Temporary use only.