20 inches long with a 4mm wide steel core Resettable combination Connectable; Use separately or together Multi-Use (bikes, car racks, luggage, skis, & many more) The new QuickZip 2-pack is a cutting edge, steel core, zip-tie style combo lock. Equipped with a 3-digit resettable combination function and 20" of locking length, these lightweight, easycarry locks have more potential than meets the eye. The 2-pack includes one red and one black lock to be used separately or daisy-chained together for even greater locking length. Whether it's for your bike, car rack, helmet, child stroller, travel luggage, or snowboard, if convenience is your priority, then these locks are for you.