The quick fixing claw by the name of Quick Claw is particulary designed for installing devices on standard rails and round tubes. The combination of the ergonomic ball handle and the release lever enables simple and quick adjustments as well as safe fastening. The system meets the requirements of the DIN standard for road ambulances and features an optional Fix-Safe function that gives the user audible and tactile feedback during tightening, indicating that the claw has been firmly and securely fastened.