Field Repair Buckles are designed to permanently repair broken buckles with just the help of a screwdriver. (The term ‘pin’ refers to the stainless-steel screws that secure the buckle) All Sea to Summit dry bags feature Field Repair Buckles, from the lightest Ultra-Sil Dry Bag to the heaviest Big River Dry Backpack. Don't let a broken buckle ruin your adventure. Be prepared and carry the appropriate size/type of Field Repair Buckle in your repair kit