— the chuck is similar to those used in electric drills: it has 3 cams and is designed to hold drills with a round shank. The name reflects the tool replacement feature: the mount is clamped by hand, it does not require additional devices (keys). Such a cartridge is very well suited for drilling, at the same time, it is not designed for chiselling, and therefore it is usually supplied as an addition to the standard SDS.
