A nibbler is a tool for cutting sheet metal with minimal distortion. One type operates much like a punch and die, with a blade that moves in a linear fashion against a fixed die, removing small bits of metal and leaving a kerf approximately 6 mm wide. Another type operates similar to tin snips, but shears the sheet along two parallel tracks 3–6 mm apart, rolling up the waste in a tight spiral as it cuts. Nibblers may be manual (hand operated) or powered.

Power nibblers are often powered by compressed air

Compressed air

Compressed air is air which is kept under a certain pressure, usually greater than that of the atmosphere. In Europe, 10 percent of all electricity used by industry is used to produce compressed air, amounting to 80 terawatt hours consumption per year....

, though electrical types also exist. A common DIY

Do it yourself

Do it yourself is a term used to describe building, modifying, or repairing of something without the aid of experts or professionals...

 nibbler tool is an electric drill attachment, which converts the rotary motion of the drill into a reciprocating motion of the jaw.