Tersma dinghy blocks include a toggle head and a shackle ratchet block for the mainsheet, as well as ball bearing and plain bearing blocks for the OP class and other dinghies. The hook blocks can be used to easily adjust the halyard.
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Hook Block (S)
OS-1602F
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Hook Block (B)
OS-1601F
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Halyard Set (B)
OS-0005F
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Halyard Set (A)
OS-0005F
