The 811 drum cheeks swivel through 360°, ensuring safe manoeuvres through a regular feeding of the tiller rope. The drum core is manufaturedfrom highly resistant aluminium combining performance and lightweight features. Drum and halyard swivel are equipped with Torlon® andDelrin® ball bearings for increased performance and mechanical resistance. 811 model comes as standard with adjustable chain plates, allowingboth mounting possibilities (chainplates or turnbuckle). This version is conform to bo..