The mini Enjoystitch trocars (5,5 mm in diameter) are in carbon, you can fix them as you please to the inside of the bushing thus allowing a rotational movement all along its axis.
They have 3 mainfunctions:
1)They allow the instrument to move in all directions within the grommet’s circumference.
2) Theyallowthe surgicalinstrumentto perfectlyslide inside the trocaravoidinganymovementof the structurethatcouldaffectthe vision
3) Theyallowa hapticdirectand realisticfeed-back.