If a buckle breaks while you're out and about, the Field Repair Buckle 15 mm Ladderlock from Sea to Summit provides a quick replacement. The sturdy buckle has a metal pin that can be unscrewed on one side and can therefore be installed on sewn-in loops. The other side is intended for looping a belt through. Buckles like this are often found on shoulder or compression straps. However, you should not forget your screwdriver when you are out and about!