This is a cast brass D Ring, ideal for use on dog collars, handbags etc. It measures 12mm (1/2") along the inside of the straight side.
These Ds have a decent depth to them, measuring 12.5mm internally from the straight bar to the centre of the curve.
Cast metalwork is far stronger than wire formed, and it's well worth knowing the difference, especially where strength is important to safety, such as with dog collars and horse tack.
