Features and Information Key safe program, register your key # with Kryptonite and receive up to 2 keys free if lost Free anti-theft protection offer for 1 year on New York series Pik-safe disc style lock on Fahgettaboudit resist picking and drilling Noose allows for super tight locking configurations Item Specifications Lock Style Keyed Lock Size 3' x 3" Bracket Incuded no

This is one of Kryptonite's toughest locks!  The chain is made from 10mm four-sided trapezoidal chain links constructed from triple heat-treated boron manganese steel.  The inner width of the chain links is slightly narrower to defend against leverage attacks.  This chain is secured with a 13mm hardened Kryptonium steel shackle with a highly secure disc-style cylindrical lock.  It comes with three keys, one lighted for use in dark places.  This lock is recommended for high crime areas.

The Beast lock series is On Guard's highest-rated secure locking system.  A chain composed of 12-mm thick links secures your bike with a keyed padlock.

The Mastiff from On Guard features a chain comprised of 10mm-thick hexagonal chain links and secured with a mini U-Lock. 

The Kryptonite New York U-Lock is the highest security Kryptonite U-lock available! Features and Information Highest security Kryptonite lock, 16mm Kryptonium steel with double deadbolt design The original $4,500 anti-theft protection offer Includes 2 standard keys, lighted key, pick-safe, anti-pick disc-style cylinder Oversized hardened steel sleeve over cross bar for double security Item Specifications Lock Size 3.5" x 6"

The Kryptonite New York Chain Lock features a heavy duty chain to keep any bike safe. This was designed to meet the needs of riders in high-crime areas. Key safe program, register your key # with Kryptonite and receive up to 2 keys free if lost Free anti-theft protection offer for 1 year on New York series Pik-safe disc style lock on Fahgettaboudit resist picking and drilling Noose allows for super tight locking configurations

The Kryptonite New York U-Lock is the highest security Kryptonite U-lock available! Features and Information Highest security Kryptonite lock, 16mm Kryptonium steel with double deadbolt design The original $4,500 anti-theft protection offer Includes 2 standard keys, lighted key, pick-safe, anti-pick disc-style cylinder Oversized hardened steel sleeve over cross bar for double security Item Specifications Lock Size 4" x 8" Bracket Incuded yes

The Rotweiler from On Guard is an armored cable lock with On Guard's X2 double-bolt locking mechanism.  Two bolts add increased pull resistance to the cable lock and the armored sheath around the cable makes it more cut resistant.

EVolution is made of 1/2" diameter hardened steel with a high-grade carbon-alloy-steel shackle. Includes bracket. Disc-style cylinder resists picking and drilling Includes lighted key

The Pitbull U-Lock from On Guard is composed of 13mm-wide hardened steel and has a four-bolt keyed locking mechanism at the base.  It is available in various lengths and widths and the 4.5" by 9" U-lock is also sold with a 4' cable.

The compact Evolution is designed with a smaller opening, preventing the use of jacks and other prying tools. 1/2" Hardened steel construction. Includes bracket and lighted key Short crossbar and shackle create the closest, most compact fit - that means better security

The Bulldog U-Lock features 13mm-wide hardened steel and has On Guard's X2 two-bolt locking mechanism.  This set comes with a 4' cable.