Muscle Box

8:1 Muscle Box

Designed to provide powerful yet precise rig tension adjustment, the Allen 8:1 Muscle Box allows high loads to be applied with minimal effort. Ideal for jib tension systems and other standing rigging controls, it gives sailors the ability to make quick and accurate adjustments while afloat, helping to optimise rig performance as conditions change.

Manufactured from high-grade stainless steel and anodised aluminium, the compact Muscle Box is built for long-term durability in demanding marine environments. Supplied pre-rigged with 3mm line, it can be installed neatly at the base of a mast or centreboard case, making it particularly well suited to dinghies where space is limited.

Key Features:

• 8:1 purchase system for powerful rig tension adjustment
• Ideal for jib tension and standing rigging controls
• Allows high loads to be applied with minimal effort
• Enables quick, precise rig tuning on the water
• Compact design for installations where space is limited
• Manufactured from high-grade stainless steel and anodised aluminium
• Corrosion-resistant construction for marine environments
• Supplied pre-rigged with 3mm line
• Suitable for mounting at the mast base or centreboard case
• Ideal for dinghies and performance sailing applications