Step 1. Check cylinder type
Identify what type of cylinder your door uses and whether it’s compatible with WELOCK smart locks.


Step 2. Measure the door thickness
Measure the full thickness of your door, including any trim cover or decorative plate.
Step 3. Measure the cylinder position
Measure the distance from the edge of the door to the center of the keyhole (this is known as the backset).

Euro Cylinders for door thicknesses of 30-70 mm
View allEuro Cylinders for door thicknesses of 50-100mm
View allWELOCK locks for American Door Cylinders
View allFAQs
The WELOCK Smart Lock is suitable for most European profile doors.
WELOCK smart locks have two sizes, suitable for door thicknesses of 30-70mm or 50-100mm respectively.
Yes, you can refer to our instruction manual or installation video to complete the installation easily, no drilling, no locksmith's help, no extra cost.
Interior doors, glass doors, wooden doors, aluminum doors, security doors, etc.