Harken 40mm Double Sheave Fishing Block - Swivel On Both Ends
Harken 40mm Double Sheave Fishing Block - Swivel On Both Ends

Harken 40mm Double Sheave Fishing Block - Swivel On Both Ends

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Optimal Performance and Durability for Marine Use

Elevate your maritime operations with the Harken 40mm Double Sheave Fishing Block, meticulously designed for exceptional control and efficiency on the water. 

This versatile block is essential for managing complex rigging systems in fishing and sailing applications. It features swivels on both ends and integrated low-friction Carbon Air technology. 

Whether adjusting sails, setting trawls, or handling heavy loads, this robust block provides smooth, reliable performance that professionals and enthusiasts can rely on.

Key Features:

  • Dual Swivel Functionality: Independent swivel actions at both ends for exceptional maneuverability.
  • Robust Construction: Made from high-strength stainless steel and composite materials for durability and resistance to corrosion.
  • Compact and Powerful: 40mm sheaves optimize space and power for critical operations.
  • High Load Capacity: Handles substantial loads easily, ensuring smooth operation during critical maneuvers.
  • Low-Friction Carbon Air Blocks: Incorporates Harken's advanced Carbo Air block technology to reduce friction, enhancing performance and speed significantly.
  • Easy Maintenance: Simplified disassembly allows for straightforward maintenance and cleaning.

✔️ Superior Swivel Technology

The double-swivel design of this fishing block allows for complete 360-degree rotation, reducing line twisting and ensuring easier handling. This feature is especially beneficial in dynamic marine environments where flexibility and quick adjustments are necessary.

✔️ Durable and Reliable Build

The Harken 40mm Double Sheave Fishing Block is constructed from premium materials and withstands the toughest marine conditions. Stainless steel ensures the block remains free from rust and degradation, while the high-quality composite sheaves offer long-lasting performance with minimal maintenance.

✔️ Advanced Load Handling

This block is designed for high-stress applications. It can handle up to 220kg with a breaking load of 440kg. It's ideal for managing heavy sails, pulling in large catches, or any activity requiring reliable load handling.


  • Sheave Diameter: 40mm
  • Maximum Rope Diameter: 10mm
  • Maximum Load: 220kg
  • Breaking Load: 440kg
  • Material: Stainless steel and reinforced composite
  • Color: Black
  • Weight: 120 grams

About Harken

For 50 years, Harken Inc. has been an innovator and market leader in the boating industry. Highlighting its international reputation for supplying marine hardware and sports accessories, the company aspires to foster sailing and fishing experience worldwide. All products have been designed to make them strong and steady with integral components of advanced technology.

This Harken 40mm Double Sheave Fishing Block gives you the upper edge to take your fishing and sailing performance to the next level. Trust Harken to elevate your marine experience with proven results and superior technology.

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