A long, sharp-centered dent that requires advanced PDR skills to remove (vertical crease, horizontal crease, or outward crease created from a tool slip)
A sharp deviation from flat in the sheet which is transferred from processing equipment subsequent to the roll bite.
A crisp, sharp bend in the metal. Often attempting to bend the metal back into its original position or shape causes it to break. Once the metal is straightened, evidence of a crease usually exists.