Requirements:

The FLEX Fingerprint & RFID Cylinder is suitable for the following door dimensions:

• Door thickness: 32mm~110mm (variable adjustable Outside 40–60mm / Inside 30–65mm)
• We recommend a minimum distance between the centre of your door lock and the door frame (backset) of 40mm so that the cylinder does not brush against the frame.

Instructions for measuring the required dimensions can be found here.