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or Sta-Lok terminals
satisfying ABYC/USCG requirements and storing spare fuses
IP66 - protected against powerful water jets
they provide additional tensile strength to resist hairline crack development and abrasion
Most Durable
Harken Aluminum Swivel Block w/Becket - 57mm October Sale or Sta-Lok terminalsHarken Aluminum Swivel Block w Becket 57mm Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon roller bearings separated and parallel to reduce friction. The sheave center carries primary load, allowing a smaller, lighter weight block.
