The Ronstan RF191 Halyard Lock is a compact and highly effective vee jammer system designed to securely lock wire halyards at a fixed position. Widely used on dinghies and small keelboats, it provides a reliable method of tensioning halyards without stretch, improving sail shape and performance.

Manufactured from marine-grade 316 stainless steel, the RF191 offers excellent corrosion resistance and durability in New Zealand’s harsh saltwater environments. The V-shaped groove locks onto a swaged copper ferrule, allowing the halyard load to be transferred from rope to wire once fully hoisted.

Typically used with a rope tail and wire strop system, the RF191 allows precise halyard positioning and can be installed at multiple heights for reefing setups. This makes it a simple yet highly efficient solution for modern rigging systems.

Key Features

• Vee jammer halyard lock design for secure wire halyard holding
• 316 stainless steel construction for corrosion resistance
• Locks onto swaged copper ferrule for precise tensioning
• Reduces halyard stretch and mast compression loads
• Compact, lightweight (approx. 5g)
• Ideal for dinghies and small keelboats
• Trusted Ronstan marine hardware quality

Specifications

• Material: 316 Stainless Steel
• Fastener Hole Diameter: 5mm
• Fastener Hole Spacing: 35.9mm
• Dimensions: approx. 48.4mm x 14.3mm
• Weight: approx. 5g
• Max Wire Diameter: approx. 3mm
• Application: Wire halyard locking and rigging termination

Why Choose the Ronstan RF191?  

For New Zealand sailors, accurate halyard tension and reliability are critical for sail performance. The RF191 provides a simple, lightweight, and highly effective solution that eliminates halyard stretch while maintaining precise sail positioning.

Its robust stainless construction and proven vee-jammer design make it ideal for dinghy racing, trailer yachts, and performance sailing setups, ensuring dependable performance in NZ coastal conditions.