A tool arrangement includes a tool unit 2, e.g. a cutting apparatus 2', a spreader 2'', a squeezing device or the like, and a drive 3, a control and/or switching clement, as well as a first operating-medium circuit 4, in which tool arrangement a second operating-medium circuit 5 is provided, which is actively connected to the first operating-medium circuit 7 by a pressurized-media converter 6.