One embodiment of a sterile networked interface system is provided comprising a hand-held surgical tool and a data processing system. An inner side wall of a flange of a retainer, said flange being arranged alongside the rollers and inner ring, is provided on a radially inner side thereof with an annular recess. The brightness enhancement recess may include light diffusion recesses. The pressure reduction is compensated for by supplying ambient air, blast air andor compressed air. The inner end plate extends perpendicularly downward from a lower surface of the outer wing section eventually terminating at a bottom portion of the central piece.