The Exit Left 409 sign is useful to direct people to an exit which will be to their left. The sign will eliminate any confusion and can provide a potential life saver during a time of emergency. Not everyone that visits your premises will be familiar with the layout.
To attempt to keep people in your building moving in the right direction, this sign is very useful. Without the sign, people may end up very confused and take the wrong direction.
Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape.