Night Latches and Rimlocks UNION provides a comprehensive range of cylinder rim and lever rim locks which are ideal for both architectural application and residential use. The range includes security variants, as well as standard variants and are ideal for use in combination with UNION mortice deadlocks on external doors. Commercial Grade Locks Commercial grade locks are the premier range and are recommended for use in all applications eg… residential, private sector, commercial office, retail and entertainment complexes and the whole spectrum of public sector developments. These locks are of superior engineering design, robust construction, use thicker gauge metals and are subject to stringent testing. Their performance is guaranteed subject to correct application. Standard Grade Locks Standard grade locks are designed to meet the demand for lower cost locks by private and public sector developers who need to meet strict budgetary constraints. The locks are ‘value engineered’ to meet functional requirements at reduced costs. The performance of this range will be inferior to that of commercial grade locks and ASSA ABLOY does not guarantee their performance in high traffic situations and in conditions where they could be subject to abuse. Caution should be exercised when using these locks in combination with heavy non-sprung or poorly sprung lever handles.