Why Shouldn’t You Use a Jack Without Jack Stands? Think that lifting a truck/car is a simple job? It can turn into a disaster quickly if you don’t do a few things right. Whether you’re replacing a tire, checking the brakes or doing any other repair under the truck, don’t rely on your jack to hold your vehicle up for you. A jack is used to lift a vehicle. It is NOT to be used to hold the vehicle for a period of time. Many people believe that a vehicle that has been lifted with a jack is safe for work to be done on it. IT IS NOT. This is where jack stands come in. These are very important tools for any work that requires the truck to be up in the air. Let’s look at why using jack stands isn’t optional and how they help create a much safer working environment. SOURCE URL: http://standesign.ca/why-shouldnt-you-use-a-jack-without-jack-stands/