Specifications:It can help golf beginners practice their waist strength and arm strength during swing.The main body is composed of 4 symmetrical propeller-shaped fan blades.V-shaped design increases wind resistance.After long-term use, the wrist strength, arm strength, and waist strength will be fully exercised.This product has a better practice effect than the conventional swing exerciser.Hollow card slot body can smoothly guide the wind, so that your swing trajectory will not appear snake-like deviation, and the swing is still arc-shaped.The humanized design of the accessories is easy to install and disassemble.As long as you swing 20 to 25 times a day at home, the force generated by the wind resistance allows you to naturally under.