Medeco® interchangeable core locks are designed so that cores can quickly and easily be changed by non-technical personnel by using a special control key. Locks can, in effect, be "rekeyed" without having a working knowledge of the lock or without having to take the lock apart. Medeco interchangeable core cylinders are available in a variety of different sizes, formats and security levels. Cores are available to fit into rim and mortise cylinders, key-in-knob locks, padlocks and bored auxiliary deadlatches and deadbolts. Some Medeco interchangeable cores are UL437 listed and provide drill and pick resistance and those that incorporate the Medeco3 design offer utility patented control. For replacement Best® style small format interchangeable core cylinders, see Medeco's KeyMark® product line.