Jack stands are essential tools used in automotive maintenance and repair. They provide stable support for vehicles after they have been lifted with a car jack. Typically made of steel or aluminum, jack stands come in various weight capacities to accommodate different vehicles. They are designed to hold the vehicle securely in place, ensuring safety while mechanics or DIY enthusiasts work underneath. Using jack stands is crucial for preventing accidents. Once a vehicle is lifted, it should never be solely supported by a jack, as jacks can fail or slip. Instead, placing jack stands under the vehicle's designated support points offers a reliable and safe way to work on cars, trucks, or other vehicles.