The K1003 is the largest Klaas mobile crane with a hook height of almost 53 metres and a maximum lifting capacity of 6 tonnes. It is mounted on a three-axle truck with a rear steerable axle. Thus manoeuvrability and comfortable handling are ideally combined with the enormous reach of the aluminium boom. The K1003 works with a dual telescopic fly jib, on which both extensions can be extended simultaneously and to the same extent. This means that the weight being carried is optimally distributed and the fly jib can be used extensively even in tight construction situations.