A metal cutting tool comprising a main tool body, a slider element (4, 6), which is received at least partially in an opening in the main tool body, is arranged movable relative thereto in an adjustment direction between a first and a second position and which has a cutting edge or is supporting a cutting insert having a cutting edge, and an internal coolant supply being arranged to be able to supply coolant from the main tool body to the cutting edge and having a coolant channel (8, 9, 10, 17) running within the main tool body as well as within the slider element (4, 6), characterized in that the main tool body, or a transfer element (7, 7') that has a coolant channel being part of the internal coolant supply and that is connected with the main tool body, comprises a first sealing surface on which an outlet of the coolant channel of the main tool body is arranged, the slider element (4, 6), or the transfer element (7, 7') that has a coolant channel being part of the internal coolant supply and that is connected with the slider element, comprises a second sealing surface on which an inlet of the coolant channel of the slider element (4, 6) is arranged, and in that there is provided a clamping element with which the first and the second sealing surfaces are pressable against each other, whereby a sealed connection between the outlet of the coolant channel of the main tool body and the inlet of the coolant channel of the slider element is provided. a main tool body, a slider element (4, 6), which is received at least partially in an opening in the main tool body, is arranged movable relative thereto in an adjustment direction between a first and a second position and which has a cutting edge or is supporting a cutting insert having a cutting edge, and an internal coolant supply being arranged to be able to supply coolant from the main tool body to the cutting edge and having a coolant channel (8, 9, 10, 17) running within the main tool body as well as within the slider element (4, 6), characterized in that the main tool body, or a transfer element (7, 7') that has a coolant channel being part of the internal coolant supply and that is connected with the main tool body, comprises a first sealing surface on which an outlet of the coolant channel of the main tool body is arranged, the slider element (4, 6), or the transfer element (7, 7') that has a coolant channel being part of the internal coolant supply and that is connected with the slider element, comprises a second sealing surface on which an inlet of the coolant channel of the slider element (4, 6) is arranged, and in that there is provided a clamping element with which the first and the second sealing surfaces are pressable against each other, whereby a sealed connection between the outlet of the coolant channel of the main tool body and the inlet of the coolant channel of the slider element is provided. received at least partially in an opening in the main tool body, is arranged movable relative thereto in an adjustment direction between a first and a second position and which has a cutting edge or is supporting a cutting insert having a cutting edge, and an internal coolant supply being arranged to be able to supply coolant from the main tool body to the cutting edge and having a coolant channel (8, 9, 10, 17) running within the main tool body as well as within the slider element (4, 6), characterized in that the main tool body, or a transfer element (7, 7') that has a coolant channel being part of the internal coolant supply and that is connected with the main tool body, comprises a first sealing surface on which an outlet of the coolant channel of the main tool body is arranged, the slider element (4, 6), or the transfer element (7, 7') that has a coolant channel being part of the internal coolant supply and that is connected with the slider element, comprises a second sealing surface on which an inlet of the coolant channel of the slider element (4, 6) is arranged, and in that there is provided a clamping element with which the first and the second sealing surfaces are pressable against each other, whereby a sealed connection between the outlet of the coolant channel of the main tool body and the inlet of the coolant channel of the slider element is provided.