PRECISION CONSTRUCTION: Durable construction that is ideal in frequent-use settings! Each barbell is a one-piece solid cast with a steel head design, encased in durable rubber to prevent damage to the weights, floors and other equipment in the exercise facility. KNURLED HANDLE DESIGN: The EZ curl fixed barbell uses a knurled ergonomic handle with chrome plating design, which increases the friction force, and also has non-slip performance to improve the grip experience. The knurling design can also effectively reduce the tension in the wrist and increase the safety of sports.