Features and advantages: Safe and convenient hinging and unhinging of tilt:- When the sash comes to tilting ‚¬â€œ e.g. in case of improper hinging of the fan-light opening stay after window cleaning ‚¬â€œ it is stopped in the catch position softly.- Fixing components and hinges are not stressed.- The automatically stopped sash can be pulled smoothly to the cleaning position desired. For closing, the sash is lifted just a little, the brake will release automatically. Fan-light openers to RAL are to be supplemented with catch stays to meet the RAL qualityand test regulations.