What is the "special tool"???? I am at a loss here, but I own the Rubbermaind stool as well and it is great for those step ups in Leaner Legs. As far as laying on it as a bench or stepping with it in her step workouts...definetly not!!! Is that what you want to know?? If you already have a "fanny lifter", yes, it will work for the step-ups in the Cathe tapes..I think she calls them sit and stands....Janice