A turning tool system having a turning tool holder, the turning tool holder having a clamping portion for connection to a tool fitting of a machine tool and a machining portion having a seat for receiving an interchangable cutting insert, wherein formed in the turning tool holder is an internal coolant guide for supplying coolant to the machining portion, which coolant guide has at least one first coolant inlet and at least one first coolant outlet arranged at the side of the seat on the machining portion, wherein the first coolant outlet has a bore which is arranged at the side of the seat and extends from a surface of the machining portion, and in which is inserted an interchangable nozzle body, which has a shank region inserted into the bore and a nozzle outlet region which is formed at an angle to said shank region and is arranged on the surface of the machining portion, wherein an internal coolant channel extends through the shank region and the nozzle outlet region that is at an angle to said shank region, characterized in that the shank region has on an outer circumferential surface a recess, into which a clamping element arranged in the turning tool holder and arranged transverse to a longitudinal axis of the shank region engages, by means of which clamping element the nozzle body is fastened to the turning tool holder, at least one further coolant outlet with a bore extending from the surface is formed on the machining portion at the side of the seat, the first coolant outlet and the further coolant outlet are formed in such a way that the nozzle body can be inserted selectively into the bore of the first coolant outlet or into the bore of the further coolant outlet, and the turning tool system has at least one blind plug, which can be inserted into the bore of the first coolant outlet or into the bore of the further coolant outlet instead of the nozzle body in order to close said bore in a fluid-tight manner. a clamping portion for connection to a tool fitting of a machine tool and a machining portion having a seat for receiving an interchangable cutting insert, wherein formed in the turning tool holder is an internal coolant guide for supplying coolant to the machining portion, which coolant guide has at least one first coolant inlet and at least one first coolant outlet arranged at the side of the seat on the machining portion, wherein the first coolant outlet has a bore which is arranged at the side of the seat and extends from a surface of the machining portion, and in which is inserted an interchangable nozzle body, which has a shank region inserted into the bore and a nozzle outlet region which is formed at an angle to said shank region and is arranged on the surface of the machining portion, wherein an internal coolant channel extends through the shank region and the nozzle outlet region that is at an angle to said shank region, characterized in that the shank region has on an outer circumferential surface a recess, into which a clamping element arranged in the turning tool holder and arranged transverse to a longitudinal axis of the shank region engages, by means of which clamping element the nozzle body is fastened to the turning tool holder, at least one further coolant outlet with a bore extending from the surface is formed on the machining portion at the side of the seat, the first coolant outlet and the further coolant outlet are formed in such a way that the nozzle body can be inserted selectively into the bore of the first coolant outlet or into the bore of the further coolant outlet, and the turning tool system has at least one blind plug, which can be inserted into the bore of the first coolant outlet or into the bore of the further coolant outlet instead of the nozzle body in order to close said bore in a fluid-tight manner.