Kryptonite's user settable combination chain lock features 7mm thick four-sided chain links made from manganese steel.

This is a tougher lock to cut through than many of the U-locks on the market.

A durable weather-resistant nylon sleeve covers the chain links to prevents scratches to your bikes.

4 foot length which is most often chosen to lock two bikes with one lock, or to lock bikes to most platform type car hitch racks.

$500 anti-theft protection available at kryptonitelock.com for $15 per year.