The Marcy Standard EZ curl bar with collars can be used with all Marcy standard weight plates & is great for building mass, strength & definition on your triceps & biceps by performing bicep, hammer curls & tricep extensions. This heavy duty chrome plated bar has a standard size & features a specially angled design to provide flawless form & grip position to increase the efficiency of each repetition, taking the strength-building workouts to the next level.