Arm Muscle Builder and Barbell Thick Hand Grip(pack of 2) Made from a high-quality material,comfortable and durable,good tensile properties. Instantly convert 1 inch bars such as any regular dumbbell, barbell,pull up bar,push up bar, cable attachment or any other bar into THICK BARS. Thicker grips help add muscle and strength to upper body(specifically your arms) effectively.Gain more mass from your weight lifting. A slit on one side allows them to be pulled open and fitted tightly round barbells, dumbbells and chin-up bars easily. 2 inch (5 cm) thick when closed and 4 inch (10 cm) long.