The Kryptonite Key Cable Bicycle Lock is a durable and weather-resistant bike lock made of steel, measuring 5 feet in length and 3/8 inches in diameter. It features a key lock mechanism, making it easy to secure your bike with a unique key. This black and yellow lock is designed for outdoor use, offering a lifetime manufacturer warranty for added peace of mind. Made in China, this lock is a reliable choice for cyclists looking for a secure and weatherproof bike lock.