Harken 2157 Pivoting Lead Block with Carbo-Cam cleat Blocks - 40mm

The Harken 2157 40mm Pivoting Lead Block with Carbo-Cam® cleat is a high-strength sailing block engineered for versatile line control aboard keelboats, dinghies, and beachcats. Up to 25% lighter than Classic-series equivalents, this Carbo Air block delivers reliable performance without sacrificing strength or durability.

Designed as a halyard control block on larger keelboats, it also excels as a "headknocker" on dinghies and beachcats for sheeting directly from the boom. The pivoting lead design allows free mast rotation while still enabling cleating and cockpit control — and it's equally at home as a boom-mounted mainsheet block for modernizing older sheet systems.

Key Features:

• Reversible Carbo-Cam® cleat — cam reverses for either up or down cleating to suit any rigging configuration
• Pivoting lead design — accommodates a wide range of sheeting angles and mounting positions
• Becket block capable — can be rigged as a becket block for added versatility
• Drop-in upgrade compatibility — hole spacing and rivet size match Classic-series models for easy retrofitting
• 40mm sheave diameter (1 9/16 in) — accepts lines up to 10mm (3/8 in) diameter
• Maximum working load: 200 lb (91 kg)
• Lightweight Carbo Air construction — strong, reliable, and corrosion-resistant

The Harken 2157 is an ideal choice for sailors looking to upgrade halyard controls, rig a boom-mounted mainsheet system, or add a functional lead block with integrated cam cleat to their control line setup.