Golf Training Equipment Swing Training Swing Practice 100cm Yellow [Strengthens Muscles with More Than Double the Weight of a Club] Although shorter than an average driver, it weighs over 550g, more than double the weight. You can expect to build more muscle than swinging a regular driver. You can train the muscles needed for swing speed, the biceps and triceps, simultaneously. [Core Strengthening to Avoid Being Thrown Around] Strengthening your core allows for a stable swing. The golf swing trainer has weight, so you'll feel the sensation of "being thrown around." Your core will be strengthened in the process of training the feeling of "being thrown" to "swinging." [Learn the Flex for Maximum Distance] You can learn the feeling of "flex" needed for increased distance. By training while imagining the transition to impact, you can learn to use your whole body in a large motion. [Effective Warm-up] Also recommended for stretching and warming up before practice. Because of the weight, it's perfect for loosening up your body. Just a few practice swings will stretch your muscles just right and warm up your body. Please use it before your round. [Size] Total Length: Approx. 100cm / Head: 7cm x 7cm [Weight] Approx. 550g [Material] Head: PVC / Shaft: ERP / Handle: Non-slip handle [Shipping] An additional 800 yen will be charged for shipping to Hokkaido/Okinawa/remote islands. Golf GOLF