You're getting ready to make a giant stride entry off the back of the boat in "Saint Somewhere". As you donning your fin the strap buckle breaks in your hand. Don't ruin a vacation because you don't have extra fin buckles in your save a dive kit. This Cressi Fin Strap Buckle Assemblies. Set is a must for the traveling diver. Set includes fin strap buckle assemblies for the Cressi Frog, Pro Light and Master Frog Fins. Buckles are made from durable corrosion proof impact resistant plastic. Easy to install on fin and strap. Each buckle consists of a male and female assembly.