The new Microtec tools for internal machining with additional holder are an innovative solution for turning small and narrow bores. The new Microtec tools consist of two parts: the clamping body and the drill shank. The clamping body is permanently mounted in the machine and has a holder for the drill shank. The boring bar can be replaced without removing the entire holder, making it easier and quicker to change the indexable insert. The five available boring bars are available for different drilling diameters and cutting edge angles and can be used with the existing CCGT030102, DCGT and VCGT minitools.