Control Block Single Swivel Head

Precise Line Control

The Lewmar Control Block Single Swivel Head is designed to deliver smooth, accurate handling of control lines where responsiveness and reliability are essential. Ideal for fine-tuning sail trim and managing lightly to moderately loaded lines, it supports confident, precise adjustments across a wide range of sailing applications.

Swivel Head Adaptability

Equipped with a freely rotating swivel head, the block automatically aligns with changing lead angles to reduce sideloading and friction. This self-orienting capability promotes efficient rope flow and consistent control, particularly in dynamic systems where line direction frequently shifts during trimming and manoeuvres.

Durable Marine-Grade Construction

Manufactured from tough, marine-grade materials, the Control Block Single Swivel Head is built to withstand the demands of the onboard environment. Precision-engineered sheave profiles and robust side plates provide dependable strength, resistance to wear, and long-term performance under repeated use.

Smooth, Reliable Performance

Designed to minimise friction and deliver predictable response, the block ensures clean, controlled line movement during rimming and easing. Its compact, stable geometry supports accurate load transfer and responsive sail handling, helping reduce effort and maintain control during extended sailing.

Installation & Application

Well-suited to control lines, travellers, and fine-adjustment systems, the Lewmar Control Block Single Swivel Head integrate easily into modern deck layouts. Suitable for both new builds and professional refits, it offers a versatile, professional-grade solution backed by Lemar’s proven deck-hardware expertise.