2-1/2" Starrett 14A Diemakers Inch Reading Double Steel Square 50117 National Blade Size height x width

Blade Size height x width x length 27/32"- 3/4" x 3/16" - 5/32" x 7-7/8" Type D Features

the construction gives infinite adjustment of all widths up to the specified maximum size

From an industrial supply house that closed 5-10 years ago

3 New Old Stock Newmans( a long closed manufacturer of Quality Canadian tool Bits) Canada HSS 1/2" x 4" Square Tool Bit Cutter Blank

2-1/2" Starrett 14A Diemakers Inch Reading Double Steel Square 50117 National Blade Size height x widthDesigned for tool and diemakers, these precision double steel squares have adjustable blades, ideal for tight fits. 2 1 2" with Graduated Blade. Complete with Graduated Blade Hardened and Ground Head and Blades A knurled clamping nut accurately locks the blades in any position Special Squares Type: Double Steel Square with hardened and ground head and blade Beam Length (in): 2 1 2" Graduations: 32nds 64ths Includes: Graduated Blade Only