Harken 2165.HTE 57mm Ratchamatic Block with swivel and 1.5 times grip: breeze-on/puffs; 15:1 holding power.

Power3 ratchet blocks provide sailors that race small one-designs with three holding-power options to handle a variety of wind and sea conditions. More choices allows sailors to fine-tune their set-ups in tandem with the purchase that provides the ideal level of power, responsiveness and grip.

This 57mm Ratchamatic is a load-sensing ratchet block 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.

The spring on the HTE (high-threshold engage) version of the 57mm Carbo Ratchamatic blocks was made stiffer to delay the point where the ratchet engages, allowing the block to run free more of the time. The ratchet function engages at higher loads to allow the old kite sheet to run free for crisper gybes.

Block Properties