On Kryptonite's 1 10 scale of security the New York Noose 1275 ranks a 9. It's a combination of a chain and u lock that effectively secures your bike so that you won't need to worry about it while you run inside for coffee. The chain itself was made from 3t hardened manganese steel. The links feature 12mm diameters and are six sided. The end loop is a cinch loop which means that you need less chain to lock up your bike. In fact, Kryptonite claims the 2. 5 foot chain features the equivalent in use length as a chain a foot longer. The chain is secured with an Evolution 4 series Disc Lock, which features a 14mm MAX Performance steel shackle. The lock cylinder itself features a reinforced anti drill, anti pull design, and the oval crossbar provides additional security. The entire length of the chain is covered with a weather resistant sleeve that is fastened in place with hook and loop fasteners. The lock itself is protected with a sliding dustcover. The lock includes three keys, one of which is lit with a high intensity bulb so you'll never fumble to find the lock in the dark again. The Kryptonite New York Noose Chain 1275 and Evolution Disc Lock are available in One size and One color.