It wasn't until I got a 10' classic longboard with a drill box leash plug that I questioned where do regular shortboard leash plugs get their holding strength. I just don't see how a small cup of plastic with a bar that spans it for a leash string stays attached to the board with just some adhesive, fiberglass weave and resin. It just seems to me that first wave of any size that pulls on the board and the leash pulls back on the board attached to the surfers leg, the thing would pop right out of the board. I am hoping someone into shaping and glassing can explain why after decades of surfing I have never had one pull out of a board and I've never heard of any surfer having one pulled out of a board except for big wave rider Greg Long on a huge wave at Cortes Bank.
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