1. Novel design: Our billiard straightness tester ensures precise accuracy of the cue with its unique circular directional design. Rotate the reference wave with ease to detect any trembling and make corrections to achieve precision and improve performance. 2. Strong and reliable: Made of strong and wearresistant materials, this billiard straightness corrector promises consistent performance over a long period of time. The robust and sturdy structure made of highstrength acrylic material will not easily deform or be damaged. 3. Performance improvement: Maximize your game with our billiard straightness tester to ensure your cue is perfectly straight at all times. A necessary tool for billiard enthusiasts and players of other cue sports, it meets all your precision needs. 4. Optimal portability: The billiard correction tester features a stowable design, allowing you to take it anywhere. Small, light, and portable, it fits into any cue case or tool box without taking up too much space.