The Cybex Eagle NX arm curl is a high-quality piece of strength training equipment that lets you focus on the upper body muscle groups & in particular the arms. The articulating arm means no adjustment is needed & users can work out in an optimal pattern for their body type or motion preference. There are swivel grips that enable you to vary exercises from dumbbell curl to hammer curl, working different muscles, & the weight machine comes with some useful holders & informative placards to get you going.