I bought 3 stainless steel bolts - sorry I don't remember the size (metric). they were just a bit larger than the hole in the stanchion so that I could not push them thru. I thru drilled the bolts slightly larger than the diameter of the lifeline, stuck a tap in the stanchion. The tap cut just enough of a thread to allow the bolts to go in. I screwed the bolts into the stanchions and put a nut on the backside
