Harken 2137 57mm Carbo Single Ratchet Cheek Block

The Harken 2137 57mm Carbo Cheek Ratchet Block is a deck-mounted sailing block designed to give sailors confident control over loaded lines. Part of Harken's trusted Carbo Ratchet series, this block delivers an ideal balance between holding power and controlled easing — making it well-suited for mainsheet, jib, and other high-load running rigging applications.

The cheek-mount design allows the block to be fastened directly to a surface, keeping it low-profile and secure on deck. The ratchet mechanism engages to significantly reduce hand load on loaded lines, reducing fatigue during extended sailing. The block comes complete with fasteners and a mounting pad for straightforward installation.

Key Features:

• 57mm (2-1/4 in) sheave diameter for smooth line handling
• Ratchet mechanism allows sailors to hand-hold loaded lines with reduced effort
• Cheek-mount configuration for fixed, low-profile deck installation
• Accepts line diameters up to 3/8 in (10 mm)
• Maximum working load: 500 lb (227 kg)
• Shackle pin diameter: 3/16 in (5 mm)
• M4 fasteners included with mounting pad
• Lightweight Carbo construction

Specifications:

• Sheave Diameter: 57 mm / 2-1/4 in
• Block Length: 83 mm / 3-1/4 in
• Max Line Diameter: 10 mm / 3/8 in
• Max Working Load: 500 lb / 227 kg
• Shackle Pin: 3/16 in / 5 mm
• Weight: 2.5 oz (71 g)
• Fasteners: M4

The Harken 2137 is a dependable, compact ratchet block built for performance sailors who demand reliable line management in demanding conditions. Includes fasteners and mounting pad.