Lewmar 40mm Control Block Double The Lewmar Control Block Double provides smooth, efficient handling of control lines with increased mechanical advantage in a compact form. Its twin-sheave design helps distribute load evenly, improving trimming efficiency and control. Manufactured from durable, marine-grade materials, the block delivers reliable, low-friction performance in demanding onboard environments. Ideal for control lines, fine-tuning systems, and performance-oriented deck layouts on cruising and racing yachts. Features: Precise Line Management The Lewmar Control Block Double is engineered to deliver smooth, efficient handling of control lines where accuracy and responsiveness are essential. Designed for modern sailing systems, I provide dependable mechanical advantage and refined load management, supporting confident trimming and adjustment in both cruising and performance applications. Compact Double-Sheave Design Featuring a twin-sheave configuration, the Control Block Double enables increased purchase within a compact footprint. This efficient arrangement allows loads to be shared evenly across the system, reducing effort at the line while maintaining clean, organised deck layouts, ideal for control lines that require frequent, precise adjustment. Marine-Grade Construction Manufactured from durable, marine-grade materials, the Control Block Double is built to withstand the demands of the onboard environment. Precision-engineered sheaves and robust side plates ensure strength, dimensional stability, and resistance to wear, delivering consistent performance under repeated load and exposure to saltwater conditions. Smooth, Reliable Performance Designed to minimise friction and promote efficient rope flow, the block delivers predictable, controlled movement during trimming and easing. Its stable geometry helps maintain alignment and consistent load transfer, supporting accurate sail control and reducing fatigue during extended sailing or high-workload manoeuvres. Technical Description Product Type Hardware Hardware Type Blocks Boat Type Sail Block Type Double Block Size Double Sheave Diameter 40mm Boat Length Up to 30ft, 31-50ft, 51-70ft
