The highly accurate TriSet optical tool presetting and measuring device allows users to measure, check and adjust tools outside the machine. The device is suitable for all conventional tool clamping systems, says Schunk, and the Schunk Tribos clamping device can be integrated as an option to enable Tribos tools to be length set, clamped and measured in seconds. The Tribos polygonal clamping technology is especially suitable for tool presetting. In contrast to other toolholding systems, no axial displacement arises with the Tribos system as clamping occurs in the radial direction only. Tool presetting enables micron precise tool measurement and this allows inspection of the cutting edge wear and edge quality. The system also caters for measurement programs that monitor radial and axial run-out that determine the “highest cutting edge” and “largest diameter” dimensions.