Portable 12-inch trimmer cuts up to 5 sheets of 20-pound paper at a time * TripleTrack rail system and durable blade carriage enable precise cuts * English and metric markings printed on easy-to-read aluminum faceplate * Swing-out 15-1/2-inch ruler; bonus replacement blade cartridge included * Measures approximately 16-3/5 by 5-2/5 by 1-2/7 inches; limited lifetime warranty