An arcuate spring is coupled between a fixed vehicle member and a movable vehicle member with a pivot connection between the members interposed between the ends of the spring such that, as the movable member is moved from a first position, the axis of the pivot connection is located outside of a line intersecting the ends of the spring, thereby holding the movable member in a first position. When the movable member is moved to a second position, the pivot connection lies between the spring and a line connecting the end points of the spring to provide a bias force which holds the movable member in a second position. In one embodiment, the over-center spring is integrated with a grab handle for holding the grab handle in a deployed or retracted position. In another embodiment, the spring is associated with a vehicle panel.