Sea to Summit Field Repair Buckle The one-pin side release buckles replace single-adjustable side release buckles, like the closures found on most top-loading backpacks. The two-pin side release buckles are a direct replacement for nonadjustable buckles such as those commonly found on dry bag closures and V-pull style waist belts. Removable stainless steel pins with Phillips head Replaces worn or broken buckles for all manner of equiptment