The Technician's Screwdriver is a flat headed screwdriver that fits in a knife layer. It has a slender and narrow blade head that is good for working with adjustment screws.
It is officially known as the Fine Screwdriver, although this name is also used for the more contemporary 91mm back-side screwdriver. Its name is taken from the knife for which it is the differentiating feature, the 93mm Alox Technician.
The Technician's Screwdriver only appears on a few knives.
On the 93mm Alox knives it replaces the can-opener, and on 91mm Cellidor knives it is typically in the position of the small-blade. The 91mm tool is usually more highly polished than on the 93mm knives.
On some knives the screwdriver has a half-stop, or catch, at the 90deg open position, to enable more torque, or to make it easier to reach a tight location.
On very early knives it was a different tool, being longer and residing in its own layer.
Wenger introduced a very similar 3.5mm straight edge screwdriver in 2007 for their 120 and 130mm models.