Simple, more affordable, and durable low friction rings, together with pre-spliced dyneema loops completely change the way we think about fixed and running rigging on boats of all kinds. They are easy to attach, detach, and move around the boat, making them an extremely versatile tool to have aboard.  Easier, lighter, and with no moving parts to service they can be used to replace blocks in many scenarios and provide years of reliable service.  Available in two lengths to fit most use cases right off the shelf.