You will need: a drill, an electric drill or a chisel with a hammer, pliers (preferably a welding clamp), a flat-blade screwdriver.

1. Drill out the bolt head from the left…

2. ...and the right side of the switch mount to the steering column and remove the ignition switch (lock) assembly with the contact group.
Note: You can use a chisel and hammer to loosen the switch mounting bolts. Using a hammer, strike the bolts counterclockwise through the chisel at a tangent.
3. Install the ignition switch (lock) in reverse order.