Securasound Ltd

The 900 Series Simplex® auxiliary lockset provides fully mechanical pushbutton access control with no electrical wiring, electronics, or batteries. 

Exterior access is by combination. Egress is by interior thumbturn and is free at all times. 

Deadbolt models are manually relocking. Deadlocking spring latch models automatically relock each time the door closes, with standard latch holdback. The 900 series locks are all Rim Latch based and include the 917 Lock (NL 100 SC)  which is designed for narrow doors of between 35 -38mm

dormakaba Simplex 900 Series pushbutton locksets are suitable for commercial or residential applications.