Toys & Joys plans are beautifully detailed and have been designed to be used as desk objects and shelf models. Plans include a material list, detailed drawings, complete assembly instructions and a photo. Wheels, axle pins and some miscellaneous turnings are available for this plan from Stockade. The Combine uses 2 - #WH525 Tractor wheels, 4 - #TP175 - Pegs, 6 - #AP400 - Axle Pins, 2 - #AP600 - Axle Pins, 2 - #WH079 - 3/4" Contour Wheels and 2 - #WH109 - 1" Contour Wheel. Please note that these parts are not included with this plan and must be ordered separately.