Tools with a thermo-mechanically modified working region and methods of forming such tools. The glass-ceramics exhibit \u03b2-spodumene ss as the predominant crystalline phase. In this way, the execution cost, for example, of a particular unit of work can be taken into account when determining which scheduling options to make available. The generally annular passage also has a cross-sectional area that alternatingly increases and decreases in a lengthwise direction along the liquid pathway. 1 to 10% by volume and a second dispersion material of at least either graphite of 1 to 15% by volume or Cu alloy phase of 1 to 20% by volume dispersed therein, with a total content of the first dispersion material and the second dispersion material being 5 to 70% by volume.