A rope strop holding a spar, such as a Gaff, to a mast. Also a similar strop holding the luff of a gaff mainsail
to the mast. Wooden balls or beads are commonly threaded on such strops to save
chafe and allow easy movement – they are then called Parrel trucks or beads or balls, or sometimes just ‘parrels’. See also Jaws and Junk.