Back Extension.

The lower back deserves its own training.

The lower back is what people start training after it has hurt, not before. Here you get back extension under load instead of just body weight, and the seat adjusts to several positions so the pivot meets your hip and not an average hip. 90 kg in the stack means you can add weight steadily, as with everything else you train, and the 985 mm width means the machine fits where you did not really have room. Length 1460 mm, dead weight 220 kg. Cheap insurance on an expensive body part.