A good point that merits some comments.

With odd objects extracted from a vehicle (say, glas splinters and a windscreen wiper) and some rocks you can create tools for slicing, poking, prying, manipulation and scraping. Those are highly valuable tools, and not only for bushcrafting - but they are not the kind of tools you need to dismantle anything serious from your vehicle.

Creating tools for mechanical jobs (such as a wrench, a 10mm spanner or needle nose pliers) is something you realistically can't do out in the bush. Now if you have a metal file and lots of time and patience you could actually create a 10mm spanner out of the seat belt buccle. No file - no 10mm spanner.

I think a flat headed screwdriver might just be possible to improvise - if the screw in question isn't too tightly screwed. Again, a file would make the creation a whole lot of easier. A philipz screwdriver? That's a lot harder. It may be possible with a file and the right material. No file? Forget it.


One obstacle is that any metal soft enough to be shaped into the right form is probably be too soft for the pressure involved in say, the tip of a screwdriver. Modern mechanical tools are hardened and tempered to be just the right compromise between hardness, strenght and brittleness. This is particular important at the tip of the tools, where the tool connect with the screw or bolt. The stresses involved here are enourmous. The wrong tempering or shape and the tip breaks/wears out immediately.