A locking Quick Release skewer that comes with our rooftop bike racks (TieRod, JetLine and the discontinued PitchFork and Euro PitchFork) and with our truck bed bolt on bike racks (Clutch series, LoBall series). It is also great for upgrading other RockyMounts rooftop bike racks (Noose, Lariat, 9mm Pitchfork, 9mm TieRod) to a locking quick release.