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Lewmar 50mm Sync Block Toggle Head Bk

Note: Some prices may reflect updates due to international tariffs. Learn the latest about tariffs

Tariff Updates

We are observing how the tariffs are behaving. Lots of our products are imported from Europe and some of the manufacturers are not providing heads up about price increases. We will do everything in our power to hold the best prices, but please consider that in these uncertain times we may be forced to increase the prices without previous notification.

We really appreciate your understanding and look forward to working with you.

What does this mean for you?

  • Some imported products may show a higher price than usual.
  • Prices may change as shipping rates adjust globally.
  • We are committed to providing the best possible pricing and transparency at all times.

How we’re handling it:

  • We only adjust prices when absolutely necessary.
  • We continuously monitor shipping rates and update pricing accordingly.
  • We’ll clearly notify you if a product is affected by tariffs.

Questions? Feel free to contact our team for any clarification or assistance.

Updated: April 2025

MSRP: $37.95
$22.77
(You save $15.18 )
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SKU:
LEW29925021BK
Availability:
Please give 24-36 business hours for our team to process your order. Once processed, lead time is 5-7 business days if item is in stock. Please call to check availability. Not available for expedited shipping. Usually Ships Within 20 Days
Weight:
0.50 LBS
Shipping:
Calculated at Checkout.
Size:
50 mm
Please call us to confirm availability.


Lewmar's Synchro Blocks are engineered for speed, efficiency and superior handling. We use 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.

Each component is perfectly synchronised with the movement of the rope, providing you with an easier, smoother transfer of power from deck to sail and less wear on your rope.

Manufacturer part #: 29925021BK

Features

  • Stainless steel strap for improved strength and longer service life
  • Stiff glass fibre reinforced cheeks to prevent lines from wedging

Applications

Plain bearing blocks are typically used for heavy and static loads in:

  • Halyard tuning
  • Mainsheet systems
  • Mast foot blocks
  • Mast head blocks
  • Boom vang

The toggle heads of the halyard blocks are designed to fit on the studs commonly found at mast bases - check the diameter of the stud against the width of the block jaws and pin diameter.

Technical Description
50
50
990 lb
450 kg
1/4 in
6 mm
3/8 in
10 mm
2.57 oz
73 g
1/2 in
13 mm
3/16 in
5 mm
5/16 in
8.2 mm
Lewmar Toggle Head Sailboat Sychro Blocks

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