HARKEN 29 mm Triple Carbo Air Block - Swivel, 344 Track Fastener_5 HH mm it is the only handle

it is the only handle to feature an auto Quick-Lock™ mechanism that allows you to place the drive head straight into the winch socket without the need to depress or rotate a knob

CB wire retaining clips and composite corner keepers keep ball bearings captive when car is off the track

Low-friction Carbo AirBlocks® are lightweight

The Harken 40mm Carbo Air® Single Block includes an integral becket that allows either a 2:1 or 3:1 purchase

HARKEN 29 mm Triple Carbo Air Block - Swivel, 344 Track Fastener_5 HH mm it is the only handleThese smooth running powerful performers make trimming easy, no matter how hard the wind blows. Carbo Air blocks are made of tough reinforced composite in size and style to fit any system: singles, doubles, triples, quads, and quints; ratchets and fiddles; soft and hard attach; 18 75 mm. Perfect for main, jib, and spinnaker sheets on dinghies and sport boats; control lines on boats of all sizes.