This billiard cue Strokes trainer is make of Glass and Acrylic materials strong enduring and long terms use. Insert into the hole to back and forth to practice playing, convenient for aiming. Light in weight and compacts, portable and easy to carry, will not take up many space. It helps to improve the stability of your cue Strokes, making it essential training tool for both beginner and professional player. This billiard Strokes exerciser is widely applicable for various game such as nine balls, eight balls, snookers.