These schematic drawings show a top view and a cutaway view of a section of the drill on NASA's Curiosity rover on Mars. The section view on the right also indicates the flow of material within the drill bit.
JPL, a division of the California Institute of Technology, Pasadena, manages the Mars Science Laboratory Project for NASA's Science Mission Directorate, Washington. JPL designed and built the rover.
More information about Curiosity is online at http://www.nasa.gov/msl and http://mars.jpl.nasa.gov/msl/.