The Delta 19421 tubular frame security mortise lock from MSL is a reliable solution for door security, especially for EI30 class fire doors. It is characterised by a robust stainless steel construction with a matt finish that is both aesthetically pleasing and durable. The lock is reversible and can be used for both left- and right-opening doors. With a deadbolt advance of 20 mm and a backset available to order in 50 mm and 60 mm, it offers flexibility for different door configurations. The special follower with a diameter of 9 mm ensures secure locking and is fitted with a round cylinder. This product is ideal for use in glass doors and offers a high level of security for everyday use. Convertible for left and right opening doors. Suitable for EI30 class fire doors. Robust stainless steel construction with matt finish. Flexible backset available to order. Secure locking with 9 mm diameter follower.