Jaws and screws have square threads. Chuck body surrounds 60 percent of screw for its entire length, which along with the square threading provides even weight distribution. Chuck has one inside and one outside jaw. Includes mounting screws and lathe chuck wrench.
Warning:This product may expose you to chemicals including Nickel, Chromium, or Lead, chemicals known to the State of California to cause Birth Defects and/or Cancer. For more information go to www.P65Warnings.ca.gov