Starrett 385-12 Steel Straight Edge With Bevel, 12" Length, 1-13/32" Width, 1...Specifications: Edge straightness .0002" per foot. Parallelism .0004" per foot. Precision made of fine tool steel to rigid Starrett standards. Completely ground throughout and finely finished. Unexcelled for drawing or scribing straight lines and checking surfaces for straightness.