Keying Systems /global/scaled/941x409x0x0x940x408/Other-multlockCOM-Pics-New Look-For Business-Patented Key Platforms-MTL_notext_All_V1.0.jpg Mul-T-Lock develops and designs keying systems to meet your evolving locking needs using advanced and unique technologies. Our keying systems prioritize high-security and technological innovation, for a secure and reliable home locking solution. Keying Options Dedicated to satisfying your needs, Mul-T-Lock offers many convenient and customizable keying options for your home and family. These options range from traditional to innovative and are designed to offer ease-of-use and full control over home locking systems. The simplest and most common keying option, Keyed Different locking systems, is comprised of multiple cylinders and keys. A single key can only unlock each cylinder and no key can unlock more than one cylinder, ensuring you have full access control and maximum home security.