Harken 2165 57mm Carbo Ratchamatic Block - 1.5 x Grip

Harken 57mm Ratchamatic® Block — Swivel, 1.5x Grip is a high-performance, load-sensing ratchet block designed for sailors who demand precise control across changing wind and sea conditions. Featuring Harken’s Power3 system, this version provides 1.5x grip with increased holding power for enhanced control in breeze-on conditions and gusts.

The Ratchamatic® mechanism allows the block to run freely in both directions under low loads, reducing friction and improving trimming efficiency. As load increases, the ratchet engages automatically, delivering additional holding power without manual adjustment. This seamless transition ensures optimal performance in both light-air and high-load situations.

The swivel head ensures optimal alignment under dynamic loads, while the lightweight Carbo construction provides strength and durability without unnecessary weight. Ideal for mainsheets, jib sheets and control lines on dinghies, sportboats and small keelboats.

Specifications

Length: 103 mm / 4 1/16 in

Weight: 104 g / 3.7 oz

Sheave Diameter: 57 mm / 2 1/4 in

Maximum Line Diameter: 10 mm / 3/8 in

Maximum Working Load: 227 kg / 500 lb

Breaking Load: 907 kg / 2000 lb

Holding Power: 15:1

Shackle Pin Diameter: 5 mm / 3/16 in

Key Features

• Ratchamatic® load-sensing technology for automatic engagement
• Power3 system with 1.5x grip for enhanced control in gusty conditions
• Free-running under low loads, ratchet engages as load increases
• 15:1 holding power for improved line control
• Swivel head for optimal alignment under changing loads
• Lightweight Carbo construction for strength and durability
• Low-friction performance for efficient trimming
• Ideal for mainsheets, jib sheets and control lines
• Suitable for dinghies, sportboats and small keelboats
• Reliable performance for racing and performance sailing