I-beam lifters, also known as CRANES, are machines used to lift and move heavy objects. They are typically used in construction, manufacturing, and shipping industries. The term 'I-beam lifter' refers to the shape of the lifting arm, which is designed to resemble an I-beam. The arm is attached to a motorized base, allowing it to move the object from one place to another. The crane operator controls the movement of the arm and the speed of the motor.