Soils, Minerals. Tool Marks Parts From Vehicles

Soil, gravel, or sand from various locations

Class evidence, different locations may have the same type of soil (my neighbor and I have the same soil. No one can determine whose lawn was stepped in from soil evaluations)

Objects that leave an impression, such as crowbars, screwdrivers, and hammers
Class evidence, hammers are mass produced with the same markings on each one

Objects broken from an automobile
Individual evidence, a broken piece can be linked back to the car it came from, especially being that the car is right there to check