The adjustable GERDA SLR cylinder facilitates the installation of the Tedee smart lock on your door. The cylinder features a security function, allowing the door to be opened with a key from the outside, even if the Tedee smart lock is installed over the key on the inside. The modular structure of the cylinder ensures a wide range of sizes for both the interior and exterior. Specifically, the interior settings range from 30 to 61 mm, while the exterior dimensions can be adjusted from 37 to 68 mm. The modular GERDA SLR cylinder is certified with a security level of 6 according to PN-EN 1303: 2015-07.