About this item Complete Olympic Dumbbell Bar Set: Includes 2 durable 16" Olympic dumbbell bars (25mm grip diameter) and 2 secure spring collars. Each bar weighs 8.3 LB unloaded; spring collars add minimal weight for true loaded performance. Soild and Sturdy: Unlike those fragile hollow bars, these bars are made of reliable quality solid steel and can hold weights up to 100 Lb. The well-plated chrome finish protects the bar from rust and corrosion For Olympic Plates: These dumbbell handles are compatible with olympic weights with 2" holes. Get these bars and utilize your weights to make your own adjustable dumbbells. No need to buy a complete set of traditional DBs. Save your money and storage space Rotating Sleeve: The rotating sleeves of dumbbell bars allow weight plates to rotate when going heavier, which relieve stress during curling and other dynamic movements Include 2 spring collars: Each spring collar is precisely produced and will secure to the bar tightly. You can curl and press without worring about the plates slip out