The LEGO TECHNIC 42138 Ford Mustang Shelby GT500 Pull-Back Car Set is a brand new complete set in box, featuring 544 pieces made of plastic. This set appeals to car enthusiasts aged 9 and above, with the added feature of a pull-back function for added play value. The Ford Mustang Shelby GT500 model is part of the LEGO TECHNIC subtheme, offering a detailed and realistic construction experience for builders interested in cars.