In one aspect, the invention relates to a double-sided, indexable milling insert comprising two rake faces, between which there extends a circumferential clearance face that, in transition to the rake faces, together with the same, forms peripheral cutting edges. A first device for adjusting and locking the safety bar and an associated device for checking the locking and a second device for adjusting and locking the safety bar and an associated device for checking the locking are provided at the exit from the stations. Improvements to usability and functionality are provided by more precisely selecting portions of a model for editing, allowing textures to be moved more easily on the model, and allowing better blending of the appearance of adjacent textures. The occlusion balloon is inflated within the lumen of the stent to occlude the carotid artery and to prevent any embolic debris from traveling downstream from the treatment site.