Harken Hoistable Furling Swivel - 4mm WireShackle-to-shackle length: 4 3/16 in. (124 mm)
This optional hoistable ball bearing halyard swivel can be installed on your headstay so you can raise or lower the sail without removing the headstay. Swivels are independent of the headstay, allowing you to tension the luff separately from the mast rake.
Maximum luff wire Ø 5/32 in. (4 mm)
Clevis pin Ø: 5/32 in. (4 mm)
Weight: 2.9 oz. (82 g)
Maximum working load: 810 lbs. (367 kg)
Use with furling unit: 435, 477