Both a delight to use and to look at, the Orbitkey Ring V2 is the next generation in key organisation. Now large enough to use with your keys, Key organizer, fobs and car keys. Orbitkeys innovative patent pending quick release locking mechanism means no more broken fingernails. Simply pull and rotate the quick-release lock to attach or detach your keys. Product Details: Fits Up to 10 Keys Secure Locking Mechanism Made with durable stainless steel. Dimensions: Diameter: 32.5mm Thickness: 2mm Opening: 3.6mm Materials: Metal: Stainless Steel Coating: PVD .