The Kryptonite Evolution Series 4 Integrated Chain Lock is the ultimate guardian for your bicycle, combining robust security with user-friendly features. Crafted with 10mm six-sided chain links made from 3t manganese steel, it offers formidable resistance against cutting and leverage attacks. The weather-resistant nylon sleeve not only protects your bike's finish but also adds durability to withstand the elements. With its pin-less link design and included LED-lit key, securing your ride has never been more convenient or reliable | Kryptonite Evolution 1016 Integrated Chain (Key)