Basic Series --- The Topcrown Basic Series bike chain lock is 3.2 feet long, weighing approximately 1.45 pounds. It is crafted from a 0.24 inch/6 mm thick alloy steel chain and is available in more than 10 colors. The Basic Series products are designed to meet essential performance requirements while also offering cost-effectiveness

5-Digit Combination --- Our bike chain lock provides heightened security with its 5-digit combination lock design. With over 100,000 possible combinations, it surpasses the standard 4-digit locks in terms of safety and convenience

Resetting is Simple --- The default password is "00000". To set a new password, just rotate the knob 90° to input your desired code, then move back the knob to its initial position. Your new password is now ready for use to unlock the lock

Sturdy & Durable --- This bicycle lock is made from a 0.24 inch/6 mm thick alloy steel chain and a strong zinc alloy lock core that resists cutting and sawing. The fabric and PE cover protect the lock chain and core from rainwater and sand, enhancing durability

Wide Application --- This bike lock chain is sufficiently long to secure 2-3 bikes together or attach your bike to a tree, gate, fence, rail, or pole. Additionally, the chain lock can be utilized for motorcycles, electric scooters, ebikes, skateboards, grills, ladders, doors, lawnmowers, and more