This pre-shaped block of wood serves as the platform on which you will design and build your big rig style Wood Derby Car. Pre-cut wood with a semi truck look including vertical exhaust pipes! Accurately cut axle grooves. You may add decals, paint, or any other details to personalize your entry. Follow the enclosed instructions and use your imagination to make your Wood Derby Car special. 7.08 in. L x 1.37 in. H x 1.77 in. W. Includes wheels and nail-type axles.