This is an extremely high quality brace with a 3 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. Ratchet 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!