The invention relates to a tool for shaping a material, in particular for bending plate material, comprising a mounting part configured to be in any case partially received in a receiving space of an apparatus, and a shaping part extending from the mounting part. The tool is provided with means for displacing the mounting part in longitudinal direction through the receiving space. The tool can thus be handled and positioned easily even when it is relatively heavy. The displacing means can comprise one or more displacing members protruding from the tool, for instance rollers or wheels. The invention also relates to a combination of an apparatus and such a tool, wherein the apparatus has a receiving space in which the mounting part of the tool is received. The receiving space here comprises a wall part on which the displacing means engage. Finally, the invention further relates to a method for positioning a tool as described above in an apparatus.