Ronstan Series 50 All Purpose Double Block, 2" Sheave, 2200lb MWL

The Ronstan Series 50 All Purpose Double Block delivers versatile and reliable performance for demanding sailing applications. Engineered for durability and low maintenance, this high-performance block is an ideal solution for sheets, halyards, and control lines on cruising and racing sailboats. Experience smooth, efficient line handling and exceptional longevity on the water. Upgrade your rigging with Ronstan's trusted engineering today.

• Generous 2-inch (50 mm) sheave diameter: Ensures smooth, low-friction operation for various line sizes.
• Accommodates up to 1/2 inch (12 mm) rope: Provides broad compatibility for mainsheet, halyard, and control lines.
• Exceptional 2200 lbs (1000 kg) Maximum Working Load (MWL): Guarantees reliable performance under demanding loads.
• High 4410 lbs (2000 kg) Breaking Load (BL): Provides an ample safety margin for critical sailing applications.
• Robust Construction: Built with a Grade 316 stainless steel load strap and impact/UV-resistant, fiber-reinforced Nylon cheeks for superior corrosion resistance and impact protection in harsh marine environments.
• Self-Lubricating Sheave: Acetal polymer sheave delivers consistently low friction and extreme durability, ensuring long service life without constant maintenance.
• Universal Head Design: Features a swivel shackle head that allows full 360-degree rotation or can be locked in two planes, preventing fouled lines and enabling flexible rigging.
• Slotted Pin Shackle: Eliminates fouled lines and simplifies attachment, ensuring efficient operation.
• Lightweight Design: Weighs only 9.0 oz (255 g), minimizing added weight aloft and optimizing overall boat performance.

• Ideal for mainsheet, halyard, vang, and spinnaker control lines on boats up to 33 ft (10m).
• Also suitable for fine-tune mainsheet tackles, cunningham, and backstay systems.
• Recommended for high-load, static applications where lines remain under high tension for extended periods.