HARKEN 100 mm Aluminum Black Magic Block - Swivel, Becket, 3247 Item Type_Accessories and then engages the ratchet

and then engages the ratchet automatically as loads increase

the rivet can be used as a becket

The patented T2 Ratchamatic is Harken’s newest block to feature the T2 line's styling and soft-attachment system

in accordance with ISO 3506 (not to be confused with A2 tool steel)

HARKEN 100 mm Aluminum Black Magic Block - Swivel, Becket, 3247 Item Type_Accessories and then engages the ratchetBlack 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,