The buckle features two axes at its center, one for the pin and another for attaching the strap. The extended part of the buckle also serves as a belt loop.Material: Cast BrassFinish: PolishedBreaking Load: 13 mm - 180 kg, 17 mm - 200 kg, 20 mm - 260 kg, 25 mm - 400 kgNote: Brass products may oxidize and darken. This is a natural property of brass. You can prevent this by treating the surface with a clear synthetic lacquer.