Smart Biometric Door Lock 2024 Model - Black LeftVD206 Universal Lock Body Specifications Lock Body Configurations The VD206 is available in two functional variants to accommodate different security needs: Single Tongue: Equipped with an automatic oblique latch. This version does not include a square tongue and is not designed for lifting or reverse locking functionsideal for basic security applications. Double Tongue: Features both an automatic oblique latch and a square tongue, enabling lifting