Ronstan Series 60 Core Block Snap Shackle Attachment J/70 Mainsheet & Traveler Lewmar Synchro blocks are engineered

Lewmar Synchro blocks are engineered for speed

delivering functionality without unnecessary visual impact

which is 10 times stronger and lighter than steel

multi-strand impregmented SK75 Dyneema

Ronstan Series 60 Core Block Snap Shackle Attachment J/70 Mainsheet & Traveler Lewmar Synchro blocks are engineeredRonstan Series 60 Core Block Snap Shackle Attachment Core Blocks are a true all round solution. A tuned 2 stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for