The Cose Metal Buckle with Rectangular Slider, 38mm in gold, is a rectangular frame-shaped metal buckle used to adjust the length of straps and belts without a locking function, only a sliding mechanism. The 38mm size, one of the largest in the range, is suitable for wide straps on larger backpacks and bags. It is an essential accessory for those who make bags, backpacks, and adjustable belts with a more robust finish than conventional plastic.