Description: 【Dumbbell Bar Handle】: The wrist strengthener bar with 10MM thread is universal for most small aperture dumbbell plates, it features simple and secure locking knobs and washers to ensure your dumbbell plates stay firmly in place during every rep (ONLY bar, NOT includes dumbbell plates) 【Sturdy Construction】: The small bore dumbbell plates training rod is made of premium nylon and metal material, sturdy, not easy to break and deform, and ensures a long time to use, comfortable grip for high intense workout 【Arm Wrestling Workout】: The wrist curl rotation exerciser bar can help train and build powerful muscles in your forearms, wrists, and fingers. This simple yet effective dumbbell handle is great for performing wrist curl, reverse, and rotational exercises to enhance your grip for sports, weightlifting or daily tasks 【Focus on Endurance & Repetition】: This forearm exerciser bar is designed for high repetition training to build muscular endurance. The recommended method is to perform controlled movements for sets of 25 reps, focusing on perfect form over weight to improve joint stability 【Ideal Gift】: This hand developer wrist bar is great for home, office and gym, ideal for fitness enthusiasts and professional athletes Specification: Material: Nylon Metal Size Chart: Handle diameter 4.5cm/1.77inch Package Includes: 1 Dumbbell Bar Handle (NOT includes dumbbell plates)