Kryptonite is the final word in cycle security; and a brand trusted by millions of cyclists world to protect their most prized cycles. Kryptonite bike locks are constantly raising the bar in terms of security, with their flagship New York U-locks successfuly preventing thefts in the world's most hectic urban environments. Westbrook offer the toughest Kryptonite locks & chains which will stand up to even the most sophisticated leverage attacks, and heavy-duty bolt cutters.