The New York Diamond Standard Lock by Kryptonite is perfect to ensure the security of your ride even in the biggest, busiest cities. This 26mm diamond-coated, double-layered steel shackle makes it angle grinder–resistant. In fact, this lock is specifically engineered to destroy grinder discs. The patent- pending hardened double deadbolt design further protects against manipulation, and the disc-style cylinder is pick and drill resistant. This lock includes a FlexFrame-U bracket, three stainless steel keys, and it’s part of Kryptonite’s key safe program. With a 10/10 security rating, you can trust in this diamond standard lock which also comes with a lifetime warranty. The SRP is $500.