Sea to Summit Field Repair Buckle

CampSaver.com says:
Sea to Summit Camp & Hike Field Repair Buckle Side Release 2 Pin-1 244. All Sea to Summit dry bags feature Field Repair Buckles from the lightest Ultra-Sil Nano dry sack to the heaviest Hydraulic dry bag. Don't let a broken buckle ruin your adventure. Be prepared and carry a Field Repair Buckle in your repair kit. Uses One-pin side release buckles replace closures found on most top-loading backpacks. Two-pin side release buckles are a direct replacement for non-adjustable buckles commonly found on dry bag closures and some backpack waist belts.