This is a set of MadStad replacement knobs for EITHER the old-style standard brackets or the newer posi-lock. This is a full posi-lock kit but with two 3/4" sealing washers added to it.
This kit consists of two posi-lock knobs, two track nuts, two e-clips, two sealing washers plus the thin fiber and plastic washers which get installed between the upper and lower bracket sections.