Drill Chuck : A small self-centering chuck having three jaws which grip a drill shank. The chuck is mounted on the spindle of a drill press, hand drill, etc
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}