90 mm Synchro Double Block - Swivel

Lewmar Synchro blocks are engineered for speed, efficiency and superior handling. They use a combination of scientifically optimised block geometry, a free-spin bearing and self-aligning head to reduce friction and increase efficiaency by up to 40% over budget blocks on mainsheet systems. Each component is perfectly synchronised with teh movement of hte rope, providing you wiht an easier, smoother transfer of power from deck to sail and less wear on your rope.
• Stainless steel strap for improved strength and longer service life
• Stiff glass fibre reinforced cheecks to prevent lines from wedging
• Innovative design with "tool-free" sliding swivel locking mechanism
• Simple switch to change from swivelling to fixed shackle
• Larger sheave diameter minimizes rope friction
• Sheave diameter: 3-1/2" (90mm)
• Shackle post diameter: 21/32" (16.5mm)
• Max pin diameter: 3/8" (9.8mm)