Switchable magnet device for fixing a formwork device onto a formwork support, comprising: a plurality of magnet packages (31a, 31b) each of which is transferable between an interaction position, in which the plurality of magnet packages (31a, 31b) is in a magnetic operative interaction with the formwork support, and a release position, in which the magnetic operative interaction between the formwork support and the plurality of magnet packages (31a, 31b) is reduced, wherein the magnet device is configured such that the plurality of magnet packages (31a, 31b), during transfer between the interaction position and the release position, at least in portions, performs a pivot movement about a pivot axis, and an actuation device (9, 36, 37) which is coupled to the plurality of magnet packages (31a, 31b) to transfer the plurality of magnet packages (31a, 31b) between the interaction position and the release position and to perform the pivot movement of the plurality of magnet packages (31a, 31b), wherein the magnet device is configured such that the actuation device (9, 36, 37) performs a linear movement along a linear movement direction at least temporarily during the pivot movement of the plurality of magnet packages (31a, 31b) and performs the linear movement away from the formwork support during the pivot movement from the interaction position to the release position; and the magnet device is configured such that the plurality of magnet packages (31a, 31b) simultaneously performs the pivot movement about their respective pivot axis; wherein the magnet device has at least one support device which has the respective pivot axis and on which the plurality of magnet packages (31a, 31b) is pivotally mounted about the respective pivot axis; wherein the actuation device (9, 36, 37) is relatively movable with respect to the at least one support device; wherein the actuation device (9, 36, 37) is respectively coupled to the plurality of magnet packages (31a, 31 b) at a load application location that is further away from the respective pivot axis than the application location of the resulting force that acts on the plurality of magnet packages (31a, 31b) due to the magnetic operative interaction, respectively, to perform the pivot movement, characterized in that a single support device is arranged in a center between the plurality of magnet packages (31a, 31b). a plurality of magnet packages (31a, 31b) each of which is transferable between an interaction position, in which the plurality of magnet packages (31a, 31b) is in a magnetic operative interaction with the formwork support, and a release position, in which the magnetic operative interaction between the formwork support and the plurality of magnet packages (31a, 31b) is reduced, wherein the magnet device is configured such that the plurality of magnet packages (31a, 31b), during transfer between the interaction position and the release position, at least in portions, performs a pivot movement about a pivot axis, and an actuation device (9, 36, 37) which is coupled to the plurality of magnet packages (31a, 31b) to transfer the plurality of magnet packages (31a, 31b) between the interaction position and the release position and to perform the pivot movement of the plurality of magnet packages (31a, 31b), wherein the magnet device is configured such that the actuation device (9, 36, 37) performs a linear movement along a linear movement direction at least temporarily during the pivot movement of the plurality of magnet packages (31a, 31b) and performs the linear movement away from the formwork support during the pivot movement from the interaction position to the release position; and the magnet device is configured such that the plurality of magnet packages (31a, 31b) simultaneously performs the pivot movement about their respective pivot axis; wherein the magnet device has at least one support device which has the respective pivot axis and on which the plurality of magnet packages (31a, 31b) is pivotally mounted about the respective pivot axis; wherein the actuation device (9, 36, 37) is relatively movable with respect to the at least one support device; wherein the actuation device (9, 36, 37) is respectively coupled to the plurality of magnet packages (31a, 31 b) at a load application location that is further away from the respective pivot axis than the application location of the resulting force that acts on the plurality of magnet packages (31a, 31b) due to the magnetic operative interaction, respectively, to perform the pivot movement, characterized in that a single support device is arranged in a center between the plurality of magnet packages (31a, 31b).