Aluminium angle square 140mm inch scale

Aluminum corner/frame 140 mm - square. Total edge length 165x185x210 mm. Thickness (approximate) 8 mm. Stamped inch scale up to 6" / no millimeter scale /. Inner part has cutouts with additional scales. Groove has screw to lock accurate readings on scale. Vertical side has opening handle extending side to 12" long / approx. 290mm /. Steel stylus, for notes.