A set of two identical floor panels, namely a fold panel and a strip panel each floor panel comprising connectors (20, 30, 6, 8, 14) on at last two edges, said connectors being integrated with the respective floor panel (1, 1') and adapted to connect the fold panel to the strip panel, so that upper joint edges of said floor panels (1,1') in the connected state define a vertical plane wherein: said connectors (20, 30, 6, 8, 14) are designed to lock said fold panel with said strip panel in a horizontal direction perpendicular to said vertical plane and in a vertical direction parallel to the vertical plane, wherein one of the connectors for providing a vertical locking comprises a flexible tongue fixed to a displacement groove in one of the two floor panels (1', 1), wherein the displacement groove is formed in an edge of the panel and is open towards the vertical plane, wherein the flexible tongue has a length direction along the joint edges, a width in the horizontal plane perpendicular to the length and a thickness in the vertical direction, wherein a projecting portion of the flexible tongue is designed to cooperate, in a connected state with a tongue groove of the other of the two floor panels (1', 1), wherein another one of the connectors for making a horizontal connection comprises a locking strip which projects from said vertical plane in the strip panel and carries a locking element, wherein said locking element cooperates, in a connected state, with a downward open locking groove of the fold panel to provide horizontal locking wherein the fold panel is adapted to be locked to the strip panel with vertical folding, wherein the flexible tongue has a groove portion which is located in the displacement groove and the projection portion which, in an unlocked position and in a connected state, projects outside the displacement groove, wherein the projecting portion has a sliding surface which during vertical folding cooperates with a sliding surface of the fold panel, such that the flexible tongue is displaced twice in the displacement groove, wherein a first displacement is effected by the vertical folding of the fold panel whereby parts of the flexible tongue are bent in its length direction parallel to the width, wherein a second displacement of the flexible tongue towards its initial position is accomplished substantially by a spring effect caused by said bending of said flexible tongue, and wherein the fold panel has a vertical locking surface, which is closer to the side of the panel that faces the subfloor than the tongue groove, and which cooperates with the strip and locks the joint edges in another vertical direction, characterised in that the displacement groove is in the strip panel, and said flexible tongue has a lower displacement surface that cooperates with a tongue locking surface, which is located at the lower part of the tongue groove and that locks the joint edges in a vertical direction. said connectors (20, 30, 6, 8, 14) are designed to lock said fold panel with said strip panel in a horizontal direction perpendicular to said vertical plane and in a vertical direction parallel to the vertical plane, wherein one of the connectors for providing a vertical locking comprises a flexible tongue fixed to a displacement groove in one of the two floor panels (1', 1), wherein the displacement groove is formed in an edge of the panel and is open towards the vertical plane, wherein the flexible tongue has a length direction along the joint edges, a width in the horizontal plane perpendicular to the length and a thickness in the vertical direction, wherein a projecting portion of the flexible tongue is designed to cooperate, in a connected state with a tongue groove of the other of the two floor panels (1', 1), wherein another one of the connectors for making a horizontal connection comprises a locking strip which projects from said vertical plane in the strip panel and carries a locking element, wherein said locking element cooperates, in a connected state, with a downward open locking groove of the fold panel to provide horizontal locking wherein the fold panel is adapted to be locked to the strip panel with vertical folding, wherein the flexible tongue has a groove portion which is located in the displacement groove and the projection portion which, in an unlocked position and in a connected state, projects outside the displacement groove, wherein the projecting portion has a sliding surface which during vertical folding cooperates with a sliding surface of the fold panel, such that the flexible tongue is displaced twice in the displacement groove, wherein a first displacement is effected by the vertical folding of the fold panel whereby parts of the flexible tongue are bent in its length direction parallel to the width, wherein a second displacement of the flexible tongue towards its initial position is accomplished substantially by a spring effect caused by said bending of said flexible tongue, and wherein the fold panel has a vertical locking surface, which is closer to the side of the panel that faces the subfloor than the tongue groove, and which cooperates with the strip and locks the joint edges in another vertical direction, characterised in that the displacement groove is in the strip panel, and said flexible tongue has a lower displacement surface that cooperates with a tongue locking surface, which is located at the lower part of the tongue groove and that locks the joint edges in a vertical direction.