The Harken 57mm Carbo Ratchet Block with Becket is a high-performance sailing block designed to give sailors greater control when handling loaded lines, particularly on high-load control systems such as mainsheets, jib sheets, and spinnaker controls.

Featuring Harken’s proven switchable ratchet mechanism, this block provides increased holding power when needed, allowing lines to be safely hand-held under load while still enabling smooth, controlled easing. When loads are lighter, the ratchet can be disengaged for free-running operation.

Constructed with lightweight Carbo composite sideplates, the block delivers exceptional strength without adding unnecessary weight. The integrated becket offers additional versatility, making it ideal for cascading or multi-purchase systems.

Key features:

57mm sheave diameter for efficient load handling
Switchable ratchet for grip when loaded and smooth release
Lightweight, high-strength Carbo composite construction
Becket for added rigging options
Ideal for mainsheets, jib sheets, and spinnaker systems

Suitable for a wide range of dinghy, keelboat, and small yacht applications, this block combines durability, control, and performance expected from Harken.

57mm Carbo Ratchet Block w/Becket