1. Material: The chain lock pliers are crafted from quality steel, featuring robust and precise components. These bicycle link pliers are ideal for loosening or securing chain locks. 2. Bicycle Chain Wear Indicator Tool: Made of hardened steel, it includes two precision indicators at 0.75 and 1.0. The 0.75 mark serves as the official wear limit for standard chain use, while the 1.0 mark is designed for use with steel sprockets. 3. Ergonomic Design: The pliers boast an ergonomic handle for comfort and effortless handling. They securely open or tighten chains without slipping. Compact yet durable, they are easy to carry. The lower part features a buckle for convenient storage. 4. Easy to Use: The chain hook can be fixed onto the chain section during assembly, allowing for easy identification and efficient operation.