Product Features:: Three ways to open patent pending lock: student key for ADA users (opens 1 lock), master key for supervisors, and combination; For lift handle lockers with hinges on the left - convenient automatic locking, like Model 1631 in the 1630 Series; Purple dial for school spirit and style. Also available in Red, Blue , Green, and Black.; ADA-Compliant - Meets United States Department of Justice "2010 ADA Standards for Accessible Design" requirements; Comes with two keys for ADA keyheads; order master keys separately; Helps mainstream students - matches the look of other locks in system; Flexible administration - assign locker for standard combination or ADA keyed use; Longer useful life with 5 different pre-set combinations; easily changed to maintain security