This is the Trident Universal Dive Fin Strap Features: 2 straps per package Universal Fit - fits most post 1990&';s fins Easy to use Long Lasting Eliminates fin drag No bucking system No assembly required Changes out in seconds Simply remove your old fin strap and buckles from fins to expose the strap attachment knobs on sides of the fin pocket. Simply slip the desired strap holes over the fin attachement knobs. Once you have a comfortable fit, use the large pull tab to quickly slide the strap on and off.