At Bena Co., there are two different types of locks. SHS-3320 Model comes in a deadbolt lock set whereas SHS-P717/SHS-P718 and SHS-H635/SHS-H505 Models come in Mortise lock sets. There is a specific installation procedure that you need to follow for each lock set.
For SHS-3320 (Deadbolt Model), please watch this video.
For SHS-P717/SHS-P718 and SHS-H635/SHS-H505 (Mortise Model), please watch this video:
To be filmed
The required space to install digital door locks varies from model to model. In case you have any decorative elements on your door (windows/moldings), please consult these images to measure the size of your installation space.