Maintain peak performance and extend the lifespan of your bike chain with the Evo CWG-1 Bicycle Chain Wear Gauge. Compatible with most 5-to-12 speed chains, this gauge ensures your chain stays in optimal condition. The go/no-go gauge accurately measures 0.75% wear, helping you determine when it's time for a replacement, preventing costly damage to your drivetrain. Additionally, the reverse side serves as a handy chain hook, making it a versatile tool for your chain maintenance needs. Trust Evo to keep your bike running smoothly and efficiently.