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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
437.71 437.71000000000004 USD
0% Off
115.04 176.99 115.04 USD
35% Off
788.61 788.61 USD
0% Off
501.14 501.14 USD
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300.06 300.06 USD
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288.96 304.16 288.96 USD
5% Off
1,341.55 1,490.61 1341.55 USD
10% Off
216.55 227.95 216.55 USD
5% Off
384.84 384.84000000000003 USD
0% Off
1,806.61 2,007.35 1806.6100000000001 USD
10% Off
779.43 779.4300000000001 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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