Surfboard softboard leash plug
thingiverse
You can secure your leash directly to one of the center fin holes using this softboard leash-plug. This setup is ideal for river surfing or other conditions where you're only using two fins. The leash-plug comes in two versions - a newer model that features an M4 screw and nut, resulting in increased durability, and an older version with a 3D-printed screw that's more prone to breaking over time.
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