The life maxx lmx1132 body pump discs are great for commercial use especially in classes or studio gyms these discs have been made from cast iron and have been given a rubber coating to stop them from leaking they also have multiple hand grips so that a range of exercises can be performed with them each weight has been colour coded so that users can easily see which weight they are using during their workouts and the discs have a hole diameter of 30mm so be sure you have a suitable size bar f