A step chock for stabilizing a vehicle or other object against undesirable movement, such as, during a rescue operation. Embodiments for a step chock includes having two leg portions, one of which angularly rotates with respect to the second with a lever to lock the two leg portions at a specific angle. The step chock is usable in three positions including where the stair-stepped top surfaces of the two leg portions are forced under the vehicle, where the top surfaces of the two leg portions are against the ground and the bottom surfaces are forced under the vehicle, and where the rear surfaces of the two leg portions against the ground and the front surfaces of the two leg portions are forced under the vehicle. Further, the step chock is usable as a fulcrum for a lever and a lever adaptor to lift a vehicle.