The bicep curl is a very simple exercise to perform, but mastering it is difficult. As you fatigue or if the weight it too much you will find you start to swing a bit, or start bringing the elbows back, putting more of the load into your Deltoids. With the use of a preacher Curl, you can lock the elbows in a still position, putting all the focus on your biceps for the ultimate arm workout. This bench has two hard rubber coated cups for bar placement between sets as well as an adjustable rest for use by athletes of all heights. You can use this bench with anything from a short barbell, EZ curl, Tricep bar or even with individual dumbbells. With simply but stable design, the Preacher Curl can be an awesome little add on to any gym set up.