Laminectomy dance with a hand -operated (1) and a first sliding (2) and a second sliding (3),where the first sliding gear (2) is connected to the second sliding gear (3) by means of an interrupted and removable nut spring structure (4), the first sliding gear (2) has an interchangeable first shaft head (5) and the second sliding gear (3) has a second interchangeable shaft head (6), the first sliding gear being: (2) and the second sliding gear (3) in the closed position shall lock the first and the second sliding gear (6), characterized by the fact that one of the two points (5, 6) can be moved laterally over a lateral coupling (7) into one of the two sliding gear (2, 3) and the other of the two points (5,6) in the open state from one rail (2, 3) to the other rail (2, 3) via a coupling point (8) or from the other of the two points (5, 6) to the other rail (2, 3) via another lateral coupling.
