This swivel-head pin vise is ideal for drilling, tapping, thread cutting, or for use as a screwdriver. It allows for easy control; it can also be used as a hand drill with twist drills. The range of the collets can hold reamers as well as screwdriver heads any round shank bits. This tool can be used for delicate work with jewelry work, when constructing models, working on instruments, and repairing watch and clock components. Capacity Range: 0 to 3.3 mm (0″-.125″).