Linex’s legendary super ruler uses a unique anti-slip feature that makes it far more effective and easier to use than a traditional ruler. An integrated rubber strip prevents the ruler from slipping on the surface. The ruler can easily be repositioned by tilting it. Divided in mm with a 0-50 cm scale on one side and a 25-0-25 cm scale on the other. With 2 bevel edges and 2 rubber strips. Material: crystal-clear acrylic with green central stripe. The ruler in the picture measures 40 cm.