6 Inch Engineer Scale Ruler

Scale:There are 4 options, the Imperial scale:1:10,1:20,1:30,1:40,1:50,1:60.The centimeter scale:1:20,1:25,1:50,1:75,1:100,1:125. Clear Scale:Architect Aluminum Ruler With Laser Cut Imperial Prints For Accuracy And Durability. Material:Triangular Ruler Made From High Impact Aluminum. Dimension:6.7 x 0.5 x 0.5 inch Features:lightweight and portable for engineering students and professional engineers, features a clip for easy storage