Magneto Ring

Magneto Ring may refer to

Finger ring worn by Agent 99 which presumably contains a magnet. The device is used to detect booby traps such as electric eyes and alarm systems [Episode #43: "Perils in a Pet Shop"].
Very powerful magnet ring which can beat any slot machine. To activate it all the user has to do is raise their arm while wearing the ring and the machine pays off. Used by Agent 0 and Zach Smart while undercover at a crooked KAOS casino run by Carlo Monte in Las Vegas [GS95 Episode #2: "Casino Evil"].