Designed for tool and diemakers, these fine precision double steel squares have adjustable blades, ideal for tight fits. 50mm Complete with Graduated, Graduated Narrow/Bevel Blades. FEATURES: Complete with Graduated Narrow Blade and Bevel Blade. Beveled blade is 45° on one end and 30° on the other. 2-1/4" (58mm). Narrow blade has mm and 1/2mm graduations. It is 4mm wide over a length of approximately 41mm and cut away at one end to a width of 2.4mm. Double Steel Square with hardened and ground head and blade.