Keying Options /Other/multlockCOM/Pics/For%20Home/999X435_Residential.jpg Dedicated to satisfying customers’ needs, Mul-T-Lock offers many convenient keying options. These options range from traditional to innovative and are designed to offer convenience, control and peace of mind. Keyed Different This keying option simply means that each product in a system is operated by only its own individual keys. Three different locks, for example, could each be opened by only by 3 separate specific keys Keyed Alike This keying option allows for the operation of multiple doors with just a single key. Multiple products in a system can be keyed to the same locking combination allowing just one key to open all of them. Three different locks, for example, could each be opened by the same key.