Abstract: A tool holder for a tool drive with an outer and an inner concentric drive shaft. A first adapter is detachably held by a conventional clamping system in a receptacle of the outside drive shaft. A second adapter is concentrically mounted in the first tool receptacle of the first adapter so as to rotate with respect to the first adapter. The second adapter has a tool receptacle which can be inclined by a pivoting element. Thus, a tool can be eccentrically inserted and concentrically driven. This makes possible certain machining modes, for example the machining of a hollow shaft, since inner threads can now be turned rather than cut.