30 mm Ball Bearing Block - Single, Stand-Up, Eyestrap Optimist making this block ideal for

making this block ideal for leading line over deck on keelboats

Fasteners: 1x MFT M5

the winch can be used for other purposes

is placed between the block body and the shackle to lock the shackle at either 0° or 90°

designed for high-performance rigging under dynamic loads

30 mm Ball Bearing Block - Single, Stand-Up, Eyestrap Optimist making this block ideal forThe BBB30 Single Stand Up Block is a 30mm ball bearing block designed for medium sized boats or trim lines. It features stainless steel ball bearings for high strength under dynamic loads, with a glass fiber reinforced composite construction for durability. Acetal bearing cage to prevent ball to ball friction and to reduce weight. Easy to install on deck with included hardware. Ideal for moderate and dynamic loads with low friction rotation.