57mm Silver Ratchamatic Power3 Block - Shackle

Is the wind steady and strong? Breeze-on with puffs? Or is the air light to medium? 57 mm Power3 ratchet blocks have one-design sailors covered with three holding-power options that best suit the day’s wind and wave conditions. More ratchet choices allow sailors to fine-tune their set-ups in tandem with the purchase that provides the ideal level of power, responsiveness, and grip.

Black = Standard Holding Power
Harken’s standard 10:1 ratchet (100 lb of force requires only 10 lb of holding power) is a great choice for medium or light-air days where it is vital to ease and trim the sheet smoothly and often. This ratchet is friendly to any type of line.
Titanium = 1.5X Holding Power
The 1.5x ratchet has a holding power of 15:1, or 1.5 times that of the standard ratchet. Use in breezy, puffy conditions to boost holding power and to ease quickly when a puff hits. Depending on line composition and cover texture, the more aggressive sheave facets can increase line wear.
Silver = 2X Holding Power
The 2x ratchet has a holding power of 20:1 or twice that of the standard block. Use in strong, steady wind where holding power is mandatory. The 2x ratchet provides the most aggressive grip on any size line or type.

Power3 ratchets are available in 57 mm switchable, shackled Ratchamatic, and T2 soft-attach Ratchamatic configurations. All Power3 ratchets may be purchased individually. The Carbo 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.