Knipex 90 55 280 sheet metal nibbler and blades 280mm knipex 90 55 280 this sheet metal nibbler 280mm from knipex has been designed with a chip breaker to cut an iron copper or aluminium sheet up to a maximum of 12mm and plastic up to a maximum of 2mm allows for cutting of materials without deformation and is easy to handle knipex 90 55 280 sheet metal nibbler 280mm