Maximize your time at the gym when you have the multi-award-winning Fat Gripz® The Ultimate Arm Builder. Designed to slide over most barbells, dumbbells, and pull-up bars, this set of workout gear actually helps you build muscle by targeting your arms. Because it increases the width of the barbell, it engages more of your muscles. As a result, you’ll get more of a workout with every movement. The Fat Gripz® work best with all variations of bicep curls as well as all axel bar training. You can even use them for pull-ups. Coming in three sizes, you can choose to begin with a smaller set at 1.75 inches and work your way up to the Extreme 2.75 inches. The Fat Gripz® take your workout from a routine into a muscle-building training session.