Product details:

This Corbin Russwin CL3355 is a very strong lever set designed to endure heavy use. It meets ANSI/BHMA A156.2 series 4000 Grade 1 requirements, conforms to ADA requirements for barrier-free accessibility and complies with A117.1 Accessibility Code. Classroom function lever can be locked on the outside lever with key while the inside lever is constantly free. Quality and Safety: Meets ANSI/BHMA A156.2 series 4000 Grade 1 requirements UL listed for 3 hour fire rated doors, 4' x 10'. Corbin Russwin levers are of top quality and strength that is unmatched by any other brand. They are designed with high durability standards and vandal resistant features to ensure utmost security for all your applications. They are made with independent return springs which will prevent lever sag and thereby prolong the life of your lock.