The Cose Metal Buckle with Rectangular Slider, 20mm in gold, is a rectangular frame-shaped metal buckle used to adjust the length of straps and belts without a fastening function, only a sliding mechanism. The gold finish gives it an elegant touch and is a popular choice in more sophisticated leather goods. It is an essential accessory for those who make bags, backpacks, and adjustable straps with a more robust finish than conventional plastic.