The Kryptonite New York M-18WL U-Lock is Sold Secure Motorcycle Gold, and Sold Secure Bicycle Diamond approved and is rated 10/10 on the Kryptonite security rating scale. It has also passed FFMC and Classe SRA testing. The 18mm diameter through-hardened Kryptonium Steel shackle resists bolt cutters and leverage attacks. It has a high security disc style cylinder and a hardended steel sleeve over the crossbar for double security. It features double deadbolt locking for extensive holding power. The center keyway defends against leverage attacks. It is supplied with three keys - one lighted for nighttime use. Protective vinyl coating. Free Lifetime Key Registration. Replacement keys available. Limited Lifetime Warranty.