Lewmar Synchro Snap Shackle – 50mm
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You have 30 days to request a return. All sale items are final sale.
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” (6–8mm)
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 you’re 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
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.