This Harken 57 mm Carbo Ratchamatic block is an automatic load-sensing ratchet block for sailing where efficient line control and low friction are important.
The block spins freely in both directions under low loads and automatically engages the ratchet function under higher loads.
With a 57 mm sheave, maximum line diameter of 10 mm, and 1.5x holding power, it is well-suited for demanding trimming tasks on board.
Key features
Automatic load-sensing Ratchamatic function
Free-spinning in both directions under low loads
Ratchet function engages automatically under higher loads
57 mm sheave for lines up to 10 mm
SWL 227 kg and breaking strength 907 kg
