This miniature Round ball Pinvisel is an ideal tool for holding small jobs, holds drill bits and reamers etc. The swivel / revolving head makes this tool handy to use. A multi use tool, with the range of the collets can hold reamers as well as screwdriver heads any round shank bits. Fits securely and comfortably in the palm of your hand. This tool can be used for delicate work with Jewelry work, when constructing models, working on instruments and repair of watch and clock components. Use it as simple as a screwdriver.