The One Touch Twizoff Automatic Bottle Opener is suitable for either metal or plastic screw-top bottle caps up to 55mm in diameter. Its rubber jaws adjust automatically to the lid size and will break seals and open caps with a smooth, effortless motion. Easy to use, store and clean, the One Touch Bottle Opener is perfect for people with weak or infirm hands. Batteries required: 2 x AA. *Batteries are not included .*