The BodyCraft Monolift for SG1 is specially designed for use in combination with the BodyCraft SG1 Super Gym. When squatting, you normally first lift the bar of the J-hooks and take a step back with the bar to complete the exercise. By using the Monolift attachment, you can take a step backwards without having to lift; the monolift the rod rests on moves with it.
After you have taken your starting position, lift the bar of the Monolift and the Monolift will fall back into place. So the Monolift is a useful tool for squatting, but also for bench pressing and other exercises with a straight barbell.