The single-hole door is easy to install without the need for additional tools.
If the lever lock is installed below the deadbolt, the Minimum distance between the lower edge of the deadbolt and the lever latch middle point would be 3.93″(10cm).
The lever lock can be installed above the deadbolt. The lower hole on the doorframe may need to be chiseled deeper to avoid interference with the deadbolt.
Documents / Resources
|ULTRALOQ Lever Smart Lock [pdf] User Guide|
Lever Smart Lock