Description: Material: This billiard cue stroke trainer is made of acrylic and aluminum material, which is sturdy, wear resistant, and ensuring long term use.Easy to Use: Insert into the hole to support the move back and forth to practice playing, which is convenient for aiming.Feature: Light in weight and compact, portable and easy to carry, will not take up a lot of space.Suitable for Cue Stroke Practice: It helps to improve the stability of your cue stroke, making it an essential training tool for both beginners and professional players.Versatile Use: This pool cue stroke exerciser is not only serves as an tool for personal practice but also makes for great entertainment during friendly match or gathering, adding fun to the interaction. Specification: Material: Acrylic, Aluminum Size Chart: 15.3cmx5.3cmx7.2cm/6.02inchx2.09inchx2.83inch Package Includes: 1 Billiards Stroke Trainer Note: Please allow slightly errors due to manual measurement and different monitors.