This Harken Carbo Ratchamatic 57 mm swivel block is an automatic ratchet block for sailing, where effective line control is required without compromising free-running at low loads.
The block features a load-sensing ratchet function that automatically engages under higher loads and allows free-running in both directions when the line is unloaded or only lightly loaded.
The adjustable load sensor allows the engagement point to be customized as needed, making the block suitable for trimming and maneuvers where precise line control is essential.
Key features
Automatic Ratchamatic ratchet function
Free-running in both directions at low loads
Adjustable load sensor
57 mm sheave for lines up to 10 mm
Hardkote-anodized and Teflon-impregnated gripping surface
