Warning: Read and follow all warning before use. Use only on a hard, flat and level surface. It is not a toy, Keep children away from ramps. Do not use on wet, oily or slippery surfaces, Inspect ramps before each use. Do not use if damaged. Do not modify ramps or use them as lever devices. Use only as a matched pair-center on left and right front or rear wheels, not one side or both ends. Center the vehicle on the raps. Align wheels straight and evenly. Do not disconnect drivetrain, break, gearbox, engine, etc. while on raps. Do not exceed weight limits 3250lb (1471kg) per ramp, 6500lb (2498kg) per pair or 13000lb (5897kg) gross vehicle weight. Use on vehicles with a maximum tire width of 12in (31cm). Ramp should have rubber feet and no debris or oil. Drive slowly and avoid sudden acceleration or braking. Chock wheels on the ground and set emergency brake once parked. If unsure, seek help from a trained professional