The Harken 57mm Carbo Ratchamatic® block is an automatic load-sensing ratchet pulley that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase. Shifting between ratchet and light-air modes is seamless with no adjustment needed.

This Harken pulley block is perfect for spinnaker sheets and ropes which need constant adjustment.

The Harken 57mm Carbo Ratchamatic® block is an automatic load-sensing ratchet pulley that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase. Shifting between ratchet and light-air modes is seamless with no adjustment needed.

This Harken pulley block is perfect for spinnaker sheets and ropes which need constant adjustment.