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 the evolving needs of your customers using advanced and patented technologies. Our patented keying systems prioritize high-security and technological innovation, for a secure and reliable locking solution. Keying Options Dedicated to satisfying customers’ needs, Mul-T-Lock offers many convenient and customizable keying options. These options range from traditional to innovative and are designed to offer ease-of-use and full control over 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, affording your customer maximum access control and security.