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Armstrong Locks is the professional Door Lock Manufacturers.
We have depelop different and safety door locks to customers for 37 years.
Insist on "quality products", 'competitive prices", "in time delivery" and "reliable service".
Model : SDDC-002
Model : SDDC-004
Model : SDDS-001
Smart Digital Invisible Door Lock - SDDS-001 feature:Easy to program, Not require physical key, Reliable for door thickness 30~50mm, Emergency opening feature, Auto / manual close mode available, Open / closed status via LED signal.