The invention provides a tool-holding fixture (10) for tools supplied with coolant or lubricant, especially lathe tools such as drilling or milling tools, with an internal channel system for supplying coolant or lubricant to the shank of the tool. To provide greater flexibility in the use of machine tools the claimed tool-holding fixture (10) is equipped with a coolant or lubricant reservoir (24) that is integrated in the tool-holding fixture, is preferably refillable and pressurizable, can be disconnected from a coolang or lubricant source when the tool is in operation and supplies the tool with an adjustable amount of coolant and lubricant by means of a metering device (38).