CONSTRUCTION Crafted from cold-drawn solid steel with a durable black powder coat finish, this Olympic curl bar is built for strength and longevity. Medium-depth diamond knurling provides a secure, non-slip grip, while the 25.4 mm shaft is designed to accommodate Olympic weight plates with a 2-inch center hole. T-Screw Collars Included. VERSATILE This curl bar is engineered to target the biceps, triceps, chest, and back. Perfect for bar bicep curls, preacher curls, skull crushers, and triceps extensions for home or garage gym setups.