Introduction
This document provides guidance on selecting the appropriate cylinder size for door locks, focusing on the central and removable part of the lock where the key is inserted.

Specifications
The document distinguishes between symmetrical and asymmetrical cylinders, detailing the measurements required for each type. It emphasizes the importance of measuring the door thickness from the middle of the fixing screw, including the trim, for both exterior and interior widths.

Compatibility
The cylinders are compatible with both symmetrical and asymmetrical doors, including single-point, multi-point, and doors with manual or automatic lifting, provided they are fitted with a European format lock.

Product Options
Various Tylock cylinder packs are available based on the exterior and interior dimensions:

• Symmetrical Cylinders: 30 mm + 30 mm, 35 mm + 35 mm, 40 mm + 40 mm
• Asymmetrical Cylinders: 55 mm + 45 mm, 60 mm + 30 mm

Each pack has a specific reference number for easy identification.

Installation Procedure
To install a new cylinder, disassemble and remove the old one, then replace it with the chosen Tylock cylinder. Complete the installation by inserting and screwing the outer knob. An installation tutorial is available online.

Additional Information
The document lists five available lengths for cylinders and notes that smart lock cylinders are compatible with doors without exterior handles. It also advises ensuring that the outside jamb of the door is not too close to the outside knob, with a minimum required distance of 25 mm from the outside frame to the middle of the cylinder.