The 2-piece Curl Bar is designed to accommodate weights with a 2-inch center hole and provides 2 hand grip positions designed to isolate and intensify your biceps and triceps workouts. Simply add weights onto ends and lock weights in place with the included collars. This weight curl bar has a maximum weight capacity of 200 pounds. 2-piece Curl Bar with Collars: 2-piece assembly Smooth ends with Spring Clip Collars Provides 2 separate grip positions to intensify the isolation and increase upper arm size in both the bicep and triceps muscle Fits , 2-Inch plates Bar weight: 17 lbs Weight capacity: 200 lbs Collars Included