Kara Yoo Sera Bag Charm 

The hinged O-ring can be hung off a bag strap or keychain.

Stainless Steel Hinged O-Rings, Silver Plated Brass (15 microns) 

Dimensions: Large O-Ring inner diameter of 27mm; Sera Charm - 37mm x 45mm. Closure: Spring Hinge O Ring. Weight: 32g. Nickel-free + hypoallergenic
Designed by Kara Yoo, Imported

Kara Yoo is a woman owned Jewelry line from Vancouver, Canada. They are a planet-conscious company and use recycled metals and limit impact on the Earth as much as possible.