Davis Sail Track Stops Product Type_Open Base Cleats Commonly 75mm blocks are for

Commonly 75mm blocks are for jibsheets and spinnakers on larger keelboats

Each comes with 5-year manufacturer's warranty

Wichard products are highly documented

(2) 1/4" RH fasteners

Harken 38mm Big Bullet In-Line exit block feeds lead lines out of the base of a mast or boom

Davis Sail Track Stops Product Type_Open Base Cleats Commonly 75mm blocks are forDavis's track stops securely at the bottom of the internal sail track to keep sail slides from falling out when the sail is lowered. When its time to lower your sail, you can rely on Davis Sail Track Stops to hold your sail and its slides in place on the mast and boom. Large knurled wheels are released with ease. Made of heavy duty, black anodized aluminum and marine grade nickel plated brass. Flat stops come with lanyard holes.