The Power Glove is an item found in The Legend of Zelda series which allows the person in possession of them to lift heavy items that were previously too heavy to lift. So far, the only character in the games who's been seen with them on is Link.
So far, they've appeared in three video games, including Zelda II: The Adventure of Link, The Legend of Zelda: A Link to the Past and The Legend of Zelda: Oracle of Ages. In the former game, the gloves only allow Link to break tough blocks with his sword, though in the latter games it'll give him the ability to lift heavy items. In both A Link to the Past and Oracle of Ages, the gloves will be upgraded to Titan's Mitts and the Power Bracelet respectively.