Abstract: A mounting block for a plastic anchor base has a pressure sensitive covering (adhesive, magnetic, or the like) its lower surface so that it may be secured to a chassis, at any convenient location. The mounting block includes a hole of conventional dimensions leading to an internal cavity which receives and encloses the part of the anchor base which protrudes through a mounting hole. In some embodiments, the internal cavity also contains opposing cam surfaces which urge the resilient members on the anchor base to a released position when the anchor base is rotated. This way, the anchor base may be removed from the mounting block by giving the anchor base a partial turn and pulling. Another feature provides capture notches for receiving and locking said barbs when the anchor base is rotated.