Toolmarks - Striations, minute scratches.

Credit: www.mshp.dps.missouri.gov
article: Toolmarks at a Crime Scene 		Other images from this article
Toolmarks - Striations, minute scratches. Impressed marks are also toolmarks A pair of scissors can leave toolmarks. Each screwdriver will leave a unique toolmark.
Toolmarks - Striations, minute scratches., www.mshp.dps.missouri.gov