Nastier Nibbler. Kett recently upgraded its AN3000 nibbler. The new and improved model - AN3500 - has a 6-amp electric motor and can chew through 10-gauge cold rolled steel or 12-gauge stainless at a rate of 90 inches per minute, the maker says. Thanks to a redesigned plunger, die holder, and punch, it also operates more smoothly and should last longer than its predecessor, the company says. It costs $188. Kett Tool Co., 513/271-0333,

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