Lockly Guard VISION DUO 698D Doorbell Video Camera Smart Lock Interconnected Deadbolt Latch Fingerprint Reader Wi Fi Bluetooth App Controlled Optional Finish Tubular Latchbolt Interior or Exterior Interior Handing Interior or Exterior Interior Handing Non Handed Finish EN Sprayed Aluminum Enamel Door Width 24 48" Diameter Piston 1 1 2" Body Projection from Door 2 3 16" Fasteners Machine Screws and self tapping screws provided for closer and arm Max Strong and durable construction for a high level of security Drilling may be required securely Air Transfer fingerprints and access code user profiles from one Lockly to another lock