Magnetic Glove
From Zelda Wiki, the Zelda encyclopedia
The Magnetic Gloves are an item that pulls Link toward or pushes him away from magnetic objects. In Four Swords, it can also be used to pull one of the other Links toward you. If you just tap the A button, it reverses the polarity of the glove(s).
This item is singular in one game:
http://www.zeldauniverse.net/images/stories/games/z9/items/glove.gif
This item is plural in one game:
http://www.zeldauniverse.net/images/stories/games/z7/items/magglove.gif