the sign posts being removable without tools, e.g. of stud-and-socket type

Full Title

Arrangement of road signs or traffic signals; Arrangements for enforcing caution (for obstructing or restricting traffic E01F13/00) > Upright bodies, e.g. marker posts or bollards; Supports for road signs > characterised by means for fixing > for holding sign posts or the like > the sign posts being removable without tools, e.g. of stud-and-socket type