the recess of the furniture fitting part 14 to be inserted fig1 from the bottom view of the driving in tool 10 shown in fig3 the form of the centering part 13 can be seen the driving in tool 10 has overall essentially a cuboid basic shape and consists preferably of plastic in a recess 16 following on from the centering part 13 there protrudes a rounded end of a journal 18 which is pressed by means of a spring 20 against a flange shaped stop 22 beneath the rounded end of the journal 18 the spring 20 is supported in a slanted recess or borehole in the region of the centering part 13 said recess or borehole being closed by a threaded pin 24 in fig1 the driving in tool 10 is inserted in a corresponding fitting part 14 the fitting part 14 has a design as already described in de 295 11 216 u it possesses a hinge arm 26 which is hinged to a hinge cup 32 by means of two links 28 and 30 the hinge arm 26 is of a known type and is therefore not described in detail the hinge cup 32 can be provided in a conventional way on a furniture door 34.