• Bicycle chain gauge: Made of tempered steel, allows for quick and easy measurement of chain wear. Includes 0.75 and 1.0 wear limit indicators. • 2-in-1 bicycle chain clamp: Pliers with chain removal and connection function. Ergonomic and durable rubber handles. Compatible with 6-12 speed chains. • Chain remover: Efficient and reliable, quickly resolves chain breakage issues. Easy to use and with a hook to secure the chain. • 5 pairs of bicycle chain rivets: Equipped with chain velcro for different speeds (6-8, 9, 10, 11, 12). Precision design and high-quality materials for a stable connection. • Suitable for a variety of bicycle chains: Compatible with Dutch, trekking, road, urban, and mountain bikes.