Twing Block

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Harken 40mm Twing Block is used for spinnaker sheet, spinnaker brace and code zero sheet up-down control. The Twing Block features: opening sideplate making it easy to rig and remo ve sheets spring biased to open when unlatched for one-handed operation  roller at pivot base for 1:1 or 2:1 up-down control Carbo Air® block construction - high strength for durability and light weight for maximum float in light air. Specifications: Max sheet diameter:                12mm Max up-down line diameter:   10mm Max working load:                   275kg Breaking load:                          825kg Show more