Product name:Bicycle chain lock, Product Size about:100*0.49cm/39.37*0.19in Product color: As shown in the figure Product material:Steel product features: 1. Four-digit combination lock: This bicycle chain lock has a convenient four-digit combination lock mechanism. The initial password is set to 0000, but can be easily reset to your preferred code for added security. There are thousands of possible combinations of four-digit numbers, making it difficult for thieves to guess or crack the lock. 2. Anti-theft protection and easy password modification: This lock is made of high-quality steel and is designed to provide reliable anti-theft protection. The sturdy steel construction makes it resistant to cutting and sawing attempts, deterring would-be thieves from targeting your bike. With this lock, you can rest assured that your bike is safe and protected. Use the initial password 0000 to open the lock, rotate the lock and hear a click sound to enter the password you need to set. 3. Multipurpose: This chain lock is not limited to securing bicycles. Its versatility allows it to be used as a stroller lock or a child's bicycle lock, keeping your valuables safe. The compact size and lightweight design make it easy to carry and use wherever you go. 4. Small but strong: Despite its small size, this chain lock is very strong and durable. High-quality steel ensures that it can withstand external forces and is not easily damaged. Its compact size allows for easy storage and portability, making it easy to slip into a backpack or pocket when not in use. 5. Lightweight and portable: The lightweight design of this chain lock increases its convenience and portability. You can easily carry it wherever you go, perfect for commuting, traveling, or any outdoor activity. Its small size and lightweight ensure it doesn't add unnecessary bulk or weight to your belongings. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 PC Bicycle chain lock