How to Set up and Use a Torque Screwdriver Student training aid for how to set up and use an electricians torque screwdriver to correctly reconnect conductors into a consumer unit (fuse board or fuse box). Video includes a full demonstration of how to set up a Wiha torque screwdriver correctly and using a slotted pozi head number 2. The demonstration includes the tightening of all connections within a domestic consumers unit (fuse box). It is important to return all the screws in a consumer unit