Wichard's new line of MX shackles are designed to function like a turning block. They're made from polished stainless steel, and most lines will slide smoothly along the contoured surface of the shackle head, creating additional purchase. These shackles can be used for various onboard applications and, just like any shackle, can easily be added to working lines without releasing the load. According to the manufacturer, they'll work well on static high-load purchase systems, such as a main-halyard system, and also on spinnaker-guy twings or jib-sheet barberhaulers. They come in three
sizes, ranging from the MX-6, for 5/16-inch line, to the MX-10, for 9/16-inch line.
$100 to $160,