Lewmar Synchro Snap Shackle 50mm

Quick-Release Attachment for Lewmar 50mm Synchro Blocks

The Lewmar Synchro Snap Shackle is purpose-built to pair with the 50mm Synchro block series, providing a fast, secure, and tool-free attachment point for your running rigging. Designed for one-handed operation under load, the snap shackle releases instantly when you need it making it ideal for spinnaker halyards, sheets, and other applications where quick release is critical.

Engineered to the same performance standards as the Synchro block range, this shackle integrates seamlessly with the patented shackle post lock system used across the Synchro line.

Compatible Applications

• Lewmar 50mm Synchro block series
• Spinnaker halyards and sheets
• Quick-release running rigging applications
• Performance sailboat rigging
• Line sizes: 1/4 to 3/8 (68mm)

Product Details

• Type: Snap shackle with quick-release trigger
• Compatible block size: 50mm Synchro series
• One-handed operation under load
• Integrates with Synchro patented shackle post lock
• SKU: 239-29925040

Parts Desk Insights

Best Use Case: This shackle is the go-to choice when you need a reliable quick-release point on a 50mm Synchro block most commonly used on spinnaker halyards where fast, clean releases are essential. If youre rigging a purchase system and need a fixed attachment rather than a quick release, a standard shackle may be more appropriate. Make sure to match the shackle to your block size: use the 60mm or 72mm Synchro snap shackle for larger block series.

50mm Synchro Blocks to Pair With

• 50mm Synchro Block Single, Black
• 50mm Synchro Block Double, Black
• 50mm Synchro Block Triple, Black
• 50mm Synchro Block Single, Black
• 50mm Synchro Block Double with Becket, Black
• 50mm Synchro Block Single with Becket & Cam, Black
• 50mm Synchro Block Triple with Becket & Cam, Black
• 50mm Synchro Halyard Block, Black
• 50mm Synchro Block Fiddle with Becket, Black
• 50mm Synchro Block Fiddle with Cam, Black

Snap Shackles for Other Synchro Sizes

• Lewmar Synchro Snap Shackle 60mm
• Lewmar Synchro Snap Shackle 72mm
• Lewmar Synchro Snap Shackle 90mm