The Flex Button is an innovative new way to adjust the strength on your sculls. The Flex Button allows you to make the sculls lighter or heavier, without tools. This can help increase rowing enjoyment and improve performance.
Frontiers Improving rowing performance by adjusting oar blade
review Archives - Small Boats Magazine
How To Measure and Adjust Oar, sweep and scull
Z&J SPORT Sculling Collar for Sculling oars, Oar Stop Button for
Issue #6 (Winter 2020/2021) - The Wave - The Coastal & Offshore
Adapting rowing rigging for masters physiology
Oar Shaft Stiffness - Rowing in Motion
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Croker Oars Rowing Oars