Save wear and tear on the headsails with jib rollers on the shrouds at the spreaders and lifelines! Extend the life of the genoa by reducing wear and tear on the genoa, especially chafe on the leech as it passes across the spreader tips. Jib rollers can also be used on lifelines for helping pass foot of the jib over the lifelines and stanchions. Jib rollers for wire sizes 5 mm – 10 mm (3/16? – 3/8?). Pack of 2 pieces.