Ideal for the production of collars, harnesses for larger dogs, and outdoor equipment, such as backpack buckles and belts. It is compatible with Biothane straps in widths of 20, 25, and 38 mm. The 17 mm size is a tight fit for 16 mm straps, which we do not recommend.Material: Zinc alloy with nickel-plated finish Breaking load capacity: 17 mm - 80 kg; 20 mm - 150 kg; 25 mm - 230 kg; 38 mm - 250 kg