HEAVY-DUTY CONSTRUCTION – Built to facilitate efficient weightlifting; this weight bar is made with a high-quality steel with a chrome finish that combines superior functionality and practical design. Its deep threads ensure secure fastening of plates. COMPATIBLE WITH STANDARD SIZE PLATES – Designed to be compatible with standard 1-inch weight plates without collapsing; this bicep curl barbell secures weight plates effectively with its threaded posts and spin lock collars for an efficient workout. ERGONOMIC BAR SHAPE – Train with this exercise bar that’s easy to use and assemble. The 4 ft. standard weight lifting barbell is one solid piece with strategic ergonomic bends in the shaft to limit stress on the wrists and reduce common injury risks. SAFETY SPINLOCKS – You can forget about unstable plates when training. This triceps curl bar features threaded spinlock collars that attach firmly onto its end to secure free weights and prevent them from moving when you exercise. 2-YEAR LIMITED WARRANTY – The Marcy Combo Curl Bar gives you the best value for your money. This free weight accessory comes with a two-year warranty to let you maximize your purchase and enjoy hassle-free use for a long time.