The Carlisle Brass Plain B12 Bathroom Turn & Release Satin Chrome has a 45mm diameter and will only operate when used with a bathroom lock or a separate bathroom deadbolt. This turn and release lock is to be used on doors up to 35mm thick. Other Variations The turn & release is also available in the following finishes: Polished brass Polished chrome Some of these variations can be found in the related products. Emergency Release Function The external rose which is fitted to the outside of the bathroom has a cross slot which can be used to open the door to anyone in an emerge...