HARKEN 100 mm Aluminum Black Magic Block - Swivel, Becket, 3247 Sailing Shackles & Swivels_Snap Shackle Adapter Built to the brand’s high

Built to the brand’s high durability standards

Their bearing system combines sideload-carrying balls with a PTFE composite bushing to carry radial loads

The larger SnapFurl uses the snap over-the-headstay

They are austenitic in the annealed state

HARKEN 100 mm Aluminum Black Magic Block - Swivel, Becket, 3247 Sailing Shackles & Swivels_Snap Shackle Adapter Built to the brand’s highBlack 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. Offered in 57 150 mm sizes, with low load versions in 57 and 75 mm ranges. A center cage keeps Torlon roller bearings separated and parallel to reduce friction. The sheave center carries the primary load,