Have you ever tried installing a door or a window yourself? Or maybe you've had one installed for you and at the end of the day, you weren't pleased with what you were looking at. Maybe your door or window was installed too high up or too low. Also, if you spend a lot of time in the kitchen, you probably know that cabinets should always be the right height. They shouldn't be too low, and neither should they be too high. This is exactly what this labour-saving lifting jack can be useful for, that is, precision. This tool allows you to lift objects in set height increments till you get them at the exact height you want them to be!