OTTO Series locks meet a specific and rather common need, namely, to replace and secure old rotary knob and push-button locks. Thanks to this series of OMR locks, it is possible to convert knob locks into state-of-the-art models without you needing a complete replacement of the door, a great advantage both economically and in terms of practicality. OTTO Series locks consist of a standard tubular latch or roller latch, and a body to accommodate a European profile cylinder, a state-of-the-art technical element with high security standards. Knob or push-button locks, now obsolete, have been widely used in the past, consequently there are not a few contexts that feature such technical elements and need targeted renewal. OMR customers require these supplies for a wide variety of public and private contexts such as hotels, offices and businesses of all kinds, airports, train stations and more. OMR Locks’ OTTO Series locks are compatible with the vast majority of older rotary knob or push-button models, and can accommodate both mechanical and electronic cylinders. Renovating your locks in this way is an opportunity that, in addition to being very essential for increasing security, improves usability and convenience and also enables the development of modern, efficient access control systems. The new OTTO Series locks represent a significant step forward in securing push-button or rotary knob doors. Replacing old locks with OTTO Series products is simple and straightforward, allowing you to enjoy the security of European profile cylinders without compromising on high compatibility with your door frame.