Tool interface adapter system for detachably securing a tool or tool aggregate temporarily to handler apparatus, - said system comprising a flange disposed on the handler side thereof, a flange disposed on the tool or tool aggregate side thereof and at least one pair (211, 212; 221, 222; 231, 232; 241, 242; 251, 252) of transfer modules (211 - 252); - with one transfer module (211, 221, 231, 241, 251) per pair (211, 212; 221, 222; 231, 223; 241, 242; 251, 252) arranged at the handler-side flange and one transfer module (212, 222, 232, 242, 252) per pair arranged at the tool-or tool-aggregate-side flange; - with the respective transfer modules (211 - 252) of said pairs (211, 212; 221, 222; 231, 232; 241, 242; 251, 252) being suited to exchange energy and/or signals among each other; - with all said transfer modules (211 - 252) each having an adapter by means of which they are secured rigidly and detachably to the flange (21, 91) supporting them directly or via a carrying plate (121, 122) on at least one securement zone (31, 32) provided in the radially outer surface thereof; and - with the adapters of all said transfer modules (211 - 252) being similar in construction; characterized in that - each adapter comprising two spaced-apart plug-in pegs (153, 154) oriented at right angles to the securement zone (31, 32), said plug-in pegs (153, 154) adapted to be introduced in corresponding recesses of the flange (21, 91) and/or the carrying plate (121, 122) supporting them, and in that - the plug-in pegs (153, 154) automatically snap into place in the recesses when introduced or are secured manually by means of at least one fixing element, said fixing element oriented at right angles to the center line of the respective plug-in peg (153, 154) and parallel with the center lines (1, 2) of flanges (21, 91). - said system comprising a flange disposed on the handler side thereof, a flange disposed on the tool or tool aggregate side thereof and at least one pair (211, 212; 221, 222; 231, 232; 241, 242; 251, 252) of transfer modules (211 - 252); - with one transfer module (211, 221, 231, 241, 251) per pair (211, 212; 221, 222; 231, 223; 241, 242; 251, 252) arranged at the handler-side flange and one transfer module (212, 222, 232, 242, 252) per pair arranged at the tool-or tool-aggregate-side flange; - with the respective transfer modules (211 - 252) of said pairs (211, 212; 221, 222; 231, 232; 241, 242; 251, 252) being suited to exchange energy and/or signals among each other; - with all said transfer modules (211 - 252) each having an adapter by means of which they are secured rigidly and detachably to the flange (21, 91) supporting them directly or via a carrying plate (121, 122) on at least one securement zone (31, 32) provided in the radially outer surface thereof; and - with the adapters of all said transfer modules (211 - 252) being similar in construction; characterized in that - each adapter comprising two spaced-apart plug-in pegs (153, 154) oriented at right angles to the securement zone (31, 32), said plug-in pegs (153, 154) adapted to be introduced in corresponding recesses of the flange (21, 91) and/or the carrying plate (121, 122) supporting them, and in that - the plug-in pegs (153, 154) automatically snap into place in the recesses when introduced or are secured manually by means of at least one fixing element, said fixing element oriented at right angles to the center line of the respective plug-in peg (153, 154) and parallel with the center lines (1, 2) of flanges (21, 91).