This truly marvellous innovation fits snugly onto your finger, enabling you to pop open caps as if by magic. Simply place your hand over the bottle, fit the cap under the ring, and presto. Never again be caught without an opener, save a fortune on dental bills and key-cutting. Finger ring design, easy to use. Used to open the beer bottles, easy to carry. 100% Brand New and High Quality Material: Stainless Steel Type:Opener Color: Silver/Black/Gold/Red Net weight: 9g Size: As the picture shows Openers Type:Bottle Openers Package Include:1/3pcs Ring Opener Note: 1.Due to the light and monitors effect, colors may have lightly difference. 2.Please allow 1-2cm errors due to manual measurement. Thank you for your understand! 3.1mm=0.039''