Tedee GERDA SLR Modular Cylinder

The Tedee GERDA SLR Modular Cylinder is a robust, all-metal lock cylinder made to simplify upgrading to smart locking. With its modular design, it adapts to a wide range of door thicknesses—from 30?mm to 61?mm internally and 37?mm to 68?mm externally—by adding or removing spacers for a tailored fit. Certified with European security standard Class?6, it offers top-tier protection against forced entry. The design allows you to maintain traditional key access on the exterior while installing a Tedee smart lock on the interior—maintaining functionality for all users.