Great Teaching Tool - This tennis baseboard is a great piece of equipment for practicing your strokes, developing a faster swing speed, or just warming up. Great teaching tool for beginners and advanced players. Great tennis self-training tool - easy to use and great for training without plucking ball, and helpful for single person practice. This training set builds speed, hand-eye coordination and endurance. Fine Design - The tennis ball training base provides stable support for training through the floor has a valve for attracting sand and water in it to increase the weight, and the small ring for hanging on the side tape, the concave part for placing tennis ball, easy and practical to use. Premium Material - The base is made of high quality plastic, robust and durable, the additional rubber rope is very elastic and portable with an exquisite design and high quality workmanship. Ideal Gift - This tennis trainer is the ideal partner to improve your overall game. Great gift for your friends, family members, and children who love playing tennis.