60 mm Ball Bearing Block - Single, Swivel Backstay thrust bearings to stabilize the

thrust bearings to stabilize the sheave when the rope enters or exits the block with

The locking arms are spring-loaded to prevent accidential locking

That means

The BBB40 Triple Becket Swivel Block is equipped with three 40 mm sheaves

halyards and backstay control in applications where stability and quick adjustments are key

60 mm Ball Bearing Block - Single, Swivel Backstay thrust bearings to stabilize theThe BBB60 Single Swivel Block is a 60 mm ball bearing block with a swiveling shaft. A plastic washer, acting as a swivel lock, is placed between the block body and the shackle to lock the shackle at either 0 or 90. The block features Delrin ball bearings for smooth rotation and glass fiber reinforced cheeks for strength. Ideal for use with mainsail, genoa, and spinnaker sheets, or control lines, in both static and dynamic load applications. Safe