Giantex Barbell Dumbbell Weight Set Gym Lifting Exercise Curl Bar Workout 64 Lb/52 Lb (52 LB) Star Collar and Anti-Slip Bars for A Secure GripStar shaped collars at each bar rod end provides strong grip and a secure exercise for you. The anti-slip metal rods provides extra steady hold. User-Friendly Designed "W" for Steady Holding W shaped handle protects our hands from skidding effectively, together with the anti-slip handle, it is ideal for you to hold up steadily. Durable and Strong Steel BarsThe dumbbell set uses steel material as bars for a strong and durable use. It has great bearing capacity and will not get damaged easily. Anti-Rust BarsThe bars uses reinforced steel bars as material not only ensures the durability but also makes sure it is anti-rust and always shine like a brand new one. Adjustable WeightsThe plate weight can be adjusted according to your physical condition. It helps you have a more effective workout. Please pay attention that: the weight limit is 220lbs. the size of the bar is 47 Inches(L) X 25mm(Dia). The plates is of propene polymer material.