Mul-T-Lock For over four decades, Mul-T-Lock® has been a worldwide leader in developing, manufacturing and marketing High Security locking products and access control solutions for institutional, commercial, industrial and residential application. Mul-T-Lock® is fully owned by ASSA ABLOY, the global leader in total door opening solutions. From locks to security doors, entrance automation and access control systems, ASSA ABLOY has an annual turnover of €6 billion and employs approximately 44,000 people worldwide. Mul-T-Lock®’s Mission To be the preferred partner for locksmiths and system Installers globally by providing differentiated, relevant and innovative High Security locking and access control solutions. Mul-T-Lock® holds hundreds of international patents for its innovative products, which provide safety, security and convenience.