Series 57 blocks are available in numerous versions and are useful wherever a powerful compact multitackle is required.

The ball bearing Macro range are freer running and have black sideplates and sheaves, whilst the plain bearing Nova Blocks are two tone dark grey and take higher loads. The multiple head units are shown in more detail on Block Features page together with technical information on how to choose the correct block for your application.

They are ideal for mainsheets up to 8.5m (28 ft) yachts and smaller multihulls. The Cam arms have good adjustment for optimum cleating angle, whilst all beckets have removable pins to make rope take-off attachment easy.

The Snapshackle unit R7475 fits to any of the 10mm pillar blocks to convert them to a one-handed operation swivel block.

Click on drawing for a larger view

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