Kryptonite Evolution features:

• Our toughest bicycle security for moderate to high crime areas.
• Passed the following tests: Sold Secure Silver Bicycle, and ART 2 Star
• 1/2" (13 mm) Through-hardened Kryptonium TM Steel shackle resists bolt cutters and leverage attacks
• New & Improved high security disc style cylinder
• Patented, high security Bent Foot TM design
• Center keyway defends against leverage attacks
• 3 keys - one lighted for nighttime use
• Anti-rattle bumpers reduce noise during transport
• Rotating dustcover protects cylinder
• Protective vinyl coating
• Includes versatile EZ Mount transportation bracket
• For increased security pair with a KryptoFlex Cable to lock your quick-release components and accessories
• Free Lifetime Key Registration
• Replacement keys available
• Limited Lifetime Warranty