Designed with both security and convenience in mind,the ASSA Large Format Interchangeable core cylinder is perfect for apartment buildings, dormitories, classrooms,and other applications requiring instant rekeying capabilities.This cylinder is adaptable to a variety of large format interchangeable core applications and can be integrated into master keyed systems that use both standard and interchangeable core cylinders. Available in standard ASSA format, large format Schlage,Yale 6 pin, Sargent 6 pin, and Corbin-Russwin 6 pin formats. Only ASSA format Interchangeable core cylinders are listed under U.L. 437.