Best Key Blanks

Best is the name most associated with the small format interchangeable core, the figure of eight core that pulls out of the lock with a control key. The cylinder stays in the door and only the core is swapped, which is why a large site can be rekeyed in an afternoon.

A blank for that system is chosen by keyway rather than by the lock it sits in, and the control key is a separate key from the one that opens the door. Establish both before ordering.