1. Security doors (steel grilles) – 3 doors Enable that all three security doors operate with one common key - 2 already work with same key. Existing locks currently use older-style lever mortice keys. Rekeying or whatever option is possible. 2. Supply and install lock handles to the front steel security grille door (only 1 out of the 3) 3. Timber external doors – 3 doors Ensure that all three timber external doors operate using one common key. Please provide a quote to align on pricing