This product is only used for replacement of vehicle tyre in emergency and should never use it beyond its designed capacity. Place the jack underneath the designated pointo on the vehicle. Select hard and level surface, padded with hard wood plates and wind up steadly. Pad the vehicle with hard wood or other materials to support it when it is jacked up in case of danger out of jack failure! Do not start the engine when jack is in use. Use hand brake to prevent slip.