Description: Enhance Hitting Power: The tennis serve master tool is designed uniquely to provide extra resistance when hitting the ball. This helps players exert more force, gradually increasing their hitting power Improve Accuracy: Training with this tennis training tool requires players to focus more on the point angle of the ball, which aids in improving accuracy control over their hits. Versatile Use: Apart from basic hitting training, the tennis practice tool can also be used for strength training of arms, wrists, shoulders as well as flexibility training Premium Material: The The tennis serve master tool is made of silicone material, with high flexibility, easy to hle use, ensuring durability longevity Package Includes: Each package comes with 1 tennis practice tool. Also a great gift choice for families friends on birthdays, holidays, festivals, etc Specification: Material: Silicone Size Chart:1 Ball: 58 cm\/22.83 inch Package Includes: 1 Tennis Training Tool Note: Please allow slightly errors 1-2cm\/0.39-0.79inch differences due to manual measurement.