Lewmar double block synchro w/becket black 72mm

Plain bearing blocks are typically used for heavy and static loads in:
Halyard tuning.
Mainsheet systems.
Mast foot blocks.
Mast head blocks.
Boom vang.
Stainless steel strap for improved strength and longer service life.
Stiff glass fibre reinforced cheeks to prevent lines from wedging.
Innovative design with “tool-free” sliding swivel locking mechanism.
Simple switch to change from swivelling to fixed shackle.