The kryptonite new york noose 1213 chain lock and padlock is a high security chain tried and tested in the streets of new york 10 mm six sided hexagonal chain links made from triple heat treated boron manganese steel for ultimate strength including a larger cinch ring narrow inner width of individual links prevent leverage attacks the ev series 4 disc lock has flat keyway locking mechanism for extensive holding power and high picking resistance and an ovalised extra strong crossbar to with