Right out the box it doesn't look sturdy enough for a full size 4x4 stuck in the mud or sand. so I keep it in the trunk of my medium size vehicle and use it instead of the factory jack in case I get a flat. The supplied protective mats are a bit flimsy, so I suggest getting something thicker to handle roadside debris and undercarriage sharp edges which WILL puncture it. So far it works great, but time and circumstances will dictate the final verdict.