https://www.rssailingstore.com/Catalogue/Dinghy-Chandlery/Shop-By-Brand/Allen-Brothers/Allen-Accessories/Allen-Inglefield-Clips
Allen Inglefield Clips - RS Sailing
Clips for fastening two lines or shock cords together for example on boat covers, spinnakers sheets and halyards, also used for flags and flags halyards.
inglefield clipsrs sailingallen