IMG 0005b I bought this shackle off Rudy years ago. It's an improved centerboard shackle with a sheave or spool to protect the braid eye splice from getting frayed. The rigging pin has a cotter pin that needs to be checked annually. I found a broken cotter pin last year on it and replaced it. I'm glad I caught it. Actually this is only my second pendant line and since I installed it I've inverted it and re spliced it. The first pendant line wasn't all that bad. I believe that because there is a single sheave up inside the keel slot for this pendant line to ride through, there really isn't going to be much wear on the line. The O'Day 26 has this same identical set up with the single sheave. I'm sure this is because the pendant line pipe that comes down from the companion way step in the cockpit has an "L" shaped bend in it whereas the O'Day 23s and 25s have a straight pipe that lines up with the centerboard shackle attachment on the centerboard. I'm pretty sure that the 1983 O'Day 22 also has a straight shot to the centerboard.