Starrett Double Square,3-1-2x9-16 In,4R Grad,2 Pc 13A

The STARRETT 13A is a 2-piece double square with a 4 in graduated steel blade and a square head. It is used for precision measuring and layout work, with an adjustable sliding blade for different measurement and marking positions. The head faces are ground square, and the blade has a satin chrome finish with inch graduations. Key features of the STARRETT 13A: Item Type: Double square with graduated blade only. Blade Size: 4 in long, 3/4 in wide, and 0.08 in thick. Blade Material and Finish: Steel blade with satin chrome finish. Graduation Style: 4R graduation with quick-reading 8ths, 16ths, 32nds, and 64ths. Graduation Details: Inch units with black etched marks; front graduation marked to 1/64 in. Head Construction: Square head made of cast iron with enamel coating. Head Size: 3 in head length, 9/16 in head width, outside dimensions 3-1/2 x 9/16 in. Head Vial: Includes vial in the head. Accuracy: +/- 0.0025 in. Squareness Tolerance: +/- 0.002 in. Straightness Tolerance: 0.001 in/ft. Measurement System: SAE.