The TT 160 and TT 460 tool touch probes are trigger touch probes for measuring and inspecting tools. The TT 160 uses a cable for signal communication, while the cableless TT 460 communicates with the SE 660 transceiver via radio or infrared signals. The disk-shaped probe contact of the TT is deflected when it touches the tool during probing, thereby generating a trigger signal that is sent to the control for processing. The trigger signal is produced a wear-free optical sensor that exhibits high reliability. The probe contact is easy to replace, and the connecting pin to the probe contact features a break point that protects the touch probe during crashes due to incorrect usage.