I have some similar made from stainless steel I saw them in a magazine being sold under the name "the conductor" think from "SanVal". I have used them to go over brass slide on joiners to reinforce them when on a curve to prevent kinking. From memory they were intended to increase conductivity by clamping the slide on joiners. I found them better than conventional clamps because the screws were on top and I didn't have to get down on my knees to fix them (not getting any younger) and they have not come loose in the 10 years they have been down. I painted them black to disguise them. I might look at these ones for my new elevated layout that I will be starting in 2 years time.