The Combo Bar has two separate grip positions that vary the isolation of the bicep and triceps muscles. Bar curls are the fastest and easiest way to increase upper arm mass, strength, and definition. A proven favorite of bodybuilders everywhere, the curl bar is a favorite piece of training equipment in every gym. The Body-Solid Curl Bar isolates and intensifies development of the bicep and forearm muscles. In addition to bar curls, this bar can perform other arm exercises like bar drops, overhead tricep extensions, reverse grip curls, 21's, upright rows, and varied grip curls.