This is an extremely high quality brace with a three jaw chuck that will securely grip round shank drills and hex shank tools. When using a traditional auger bit, the end of the bit sits in a square hole in the bottom of the chuck -- that bit is not going to spin for any reason. Ratched mechanism allows the brace to work in confined spaces with ease. Many woodworkers find that this old-fashioned tool is not something easily replaced in this modern world!