Many divers prefer springstraps over the factory installed rubberstraps as springstraps are more flexible and durable. This is a guide how to install springstraps on the original Scubapro Jet-Fin 

The original buckle has been rivited and the easyest method of removal is to file off the rivethead.

Disassemble the original buckle.

Insert the springstrap into the holes and tighten gently.

Tighten until close fit but make sure the buckle can move freely.