It fits easily thanks to its central wheel and fast adjustment mechanism. Needle and interchangeable mines. Rome needle to prevent injuries. Articulated legs facilitate the drawing of large radios. Length of 156 mm. Its maximum diameter is 260 mm. and, with alargade, approximately 395 mm. Its universal adapter allows to create precise circles with all the instruments of writing and drawing. of blue and silver, it comes in a transparent plastic case with folding lid.