An engine stand is a tool commonly used to repair large heavy gasoline or diesel engines. It uses a heavy cantilevered support structure to hold the engine in midair so that the mechanic has access to any exposed surface of the engine. They are often referred to as cherry pickers. These can be used to take a motor out of or put a motor into a vehicle, as well as mount it to dissect the motor and fix its internal components, without the uncomfortable positions one may encounter working on it while it is still in the engine bay. Many stands feature a rotating mounting head that allows the mechanic to access any part of the engine with ease, making the engine-building process much smoother.