The Heavy Duty Wheel Step, No. 1734A, from OTC provides quick, easy access to under-hood components. The wheel step fits heavy duty vehicles (Class 7/8), installs in seconds, and has a non-skid platform. Fits tire widts range of 9-1/2" to 14-1/4", in 1-1/8" increments. This tool has a capacity of 300 lbs.