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Lewmar Synchro Fiddle Blocks are used in purchase systems to allow the trimmer to sheet in higher loads with ease. The Fiddle Blocks can be attatched onto the boom giving you a powerful purchase on your main block and tackle.
Synchro blocks from Lewmar are engineered for speed, efficiency and superior handling. These blocks suit a range of purposes from performance cruising yachts to specific high-load low-movement applications on racing sailboats. Lewmar uses a combination of scientifically optimised block geometry, a Free-Spin bearing and self-aligning head to reduce friction and increase efficiency by up to 40% over budget blocks on mainsheet systems.
Lewmar Synchro Blocks Feature