A local rigger helped me splice up my dyneema lifelines last week. While on the boat he noticed my cotter rings in my lifelines and mentioned that I could replace them with "a barrel like pin that is hollow and can be secured from the bottom with an insert that goes up and into the pin." The idea was that the cotter rings could be eliminated.....stopping the potential for snagged lines, sheets, and sails. He is off for the cup, and will be hanging around for a return delivery....might be gone awhile. Can anyone name these "pins" or supply a link? Thanks!