Nape piercing
Somewhat less common are surface anchors, commonly made from surgical implant-grade titanium. A surface anchor has two parts: a base or foot which is inserted under the dermis during the piercing process and which incorporates a stem exposed to the surface, and a decorative disc or ball of jewelry which typically appears flush with the surface of the skin. Surface anchor nape piercings are most commonly found placed symmetrically on either side of the spine at the nape.
Open VOGEL
One or more lifting surfaces can be attached to a fuselage by means of features called "anchors". An anchor is a set of slender panels that belong to the fuselage and serve as a bridge between the root of a wing and the panels of the fuselage. Anchors are needed to provide a transition in the circulation of both surfaces, i.e., to properly model a physical connection between both of them. Without anchors, the gap between the two surfaces would leak, creating regions of very high airspeed and a consequent wrong prediction of the air-loads.