LEGO Technic 42042 Crawler Crane Features Power Functions motorized boom, winch, superstructure and caterpillar tracks Also features an opening claw, tilting cab, extendable boom, extensive cabling and a realistic exhaust pipe and ventilation grid 2-in-1 model: rebuilds into a Mobile Tower Crane Crawler Crane measures over 24" (61cm) high, 23" (60cm) long and 7" (20cm) wide Mobile Tower Crane measures over 23" (60cm) high, 22" (58cm) long and 7" (20cm) wide