AA 2, Drafting Standards for Aluminum Extruded Products (Tenth Edition, July 2012), sets out a uniform method of preparing the extrusion profile drawings that are constantly exchanged between customers and extruders. Section I explains why standardized drafting practice benefits both parties; Section II defines the product forms covered; Section III covers the identification of extruded shapes, extruded rod, extruded bar, extruded tube and drawn tube. Section IV addresses the profile drawing itself, including its principal function, drawing format, title block and profile geometry, while Sections V and VI deal with special tolerances and the notes that accompany a drawing. The standard helps extruders maintain reasonable efficiency in the manufacture of extrusion tools and in the inspection of extruded material, and helps customers obtain suitable, economically produced extrusions.