Thumbturn and Release on concealed fix 2 part screw on round rose. The thumbturn has a easy to operate long round bar lever with a coin release on the other side in case of emergency access. The chamfered edge concealed fix rose reflects the attention to detail in this range. Certified to BS8300 to meet the needs of disabled people. Ideal for public/office doors where a more ergonomic operation is a necessary requirement. Comes with a 10 year mechanical guarantee and is Fire door rated. Suitable for all domestic, commercial and industrial use. Click here for care instructions