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2:1 Purchase

2:1 Blocks are almost exclusively designed to attach to furler top swivels for 2:1 halyard system. 2:1 Shackles can be used for 2:1 halyards on smaller code zero and asymmetric furlers but are mainly used for a 2:1 purchase under the furling drum. Size the 2:1 block/shackle to be equivalent to the SWL of the furler. OR if it is a pin connection - to match the pin diameter on the furler / swivel. Read more...


  • 3:1 Purchase
  • 2:1 Purchase
320.55 320.55 USD
0% Off
582.55 582.5500000000001 USD
0% Off
1,407.93 1407.93 USD
0% Off
796.92 796.9200000000001 USD
0% Off
502.36 558.18 502.36 USD
10% Off
376.03 376.03000000000003 USD
0% Off
334.74 334.74 USD
0% Off

Note: be careful to double check shackle jaw width related to drum/swivel spindle. For a halyard, it is deadended on the mast and then runs around the bearing surface of the 2:1 shackle/block and then into the halyard sheave and down to deck level. For a 2:1 Tackline, the line is deadended at deck level and then up around the Frictions sheave and then down to a block on the deck and back to a jammer cleat / winch for tensioning.

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