Safety design-The lock is constructed with a metal inner shell, which is durable and the plastic covered cable is resistant, despite its thickness of 0.5 inches. The anti-theft security mode is designed to slow down theft when some places are entered instantly. Simple operation-follow the user manual to turn the locking collar to set your own four-digit combination, up to 10,000 codes can be set. Lightweight and simple, it is very suitable for students to use. Multi-purpose-Lock bicycle saddles and wheels, strollers, skis, suitcases and luggage, laptop bags, and provide basic protection.Portability-easy to carry, suitable for small body, light weight. The extension cord has a length of 1500 mm and can lock items within 2 feet. Color and customer service-available in black. If you have any questions, please feel free to contact us, we will solve the problem as soon as possible.