This is a shallow cast D ring which has been plated in nickel for a silver coloured finish.
It measures 1"(25mm) across the inside of the straight edge.
Cast D rings are much stronger than wire formed, and recommended for use on dog collars horse tack etc. They're also great for attaching straps to handbags etc.
Also available in packs of 10 at a lower price per item, and in the original brass finish. Smaller sizes are also available - see below for related products.