The barrel of a firearm is a tool that leaves a tool mark on bullets. Anytime two objects come together there is the potential for the softer of the two items to be marked in some way. Tool marks are very common in any crime where forced entry is involved.
Tools commonly used are screwdrivers, pry bars, hammers, and bolt cutters.
This was done to reach the ignition and to disable the steering wheel lock. The investigating officer submitted the steering column along with the screwdriver to see if the screwdriver might have been used to pry open the steering column. Cast tool mark. Standards were then made with the questioned screwdriver. The tip of the screwdriver was pulled across soft sheet lead at various angles and in different directions.