There are two options for Closed Loop Locks on a Melges 24 Shroud Adjustment System ﾖ one for an Open Body Turnbuckle and one for Ronstan Turnbuckles.
This Hutchinson Sports Closed Loop Lock is designed for Open Body Turnbuckles. A Closed Loop Lock is used to keep the shroud from spinning while the tension is being adjusted. Sold as a pair.
Note: Long enough to avoid deflecting the diagonal shroud while fully tensioned.