SPI 13-193-8 Adjustable Double Square: English & Metric Graduation, 4 inch Blade
Precision ground satin chrome blade with crisp graduations in both English (1/64th inch & 1/32nd inch) and Metric (0.5mm and 1mm). Hardened steel construction with tempered steel blade. Adjustable 4 inch blade allows the square to be used in areas inaccessible to fixed-blade squares.