Drum and halyard swivel are equipped with Torlon® and Delrin® ball bearings for increased performance and mechanical resistance. 811 model comes as standard with adjustable chain plates, allowing both mounting possibilities (chainplates or turnbuckle). The 811 drum cheeks swivel through 360°, ensuring safe manoeuvres through a regular feeding of the tiller rope. The drum core is manufatured from highly resistant aluminium combining performance and lightweight features. Max. headsail size – 12,5 m², Drum sheet capacity - 7 m, Ø 5 mm. Supplied complete for forestay – 4 - 6 m, Finished luffrope Ø – 5 mm.