When working with hollow forms, bowls, or platters it can be quite cumbersum to work the base of your project with out damaging or marring the rim. With the Big Easy Jaw you can easily chuck your project with out fear of marring or marking your piece since it will rest against the urethane Grippers. The Big Easy Jaw uses Snap Lock Technology which makes it easy to install on your Easy Chuck in about 30 seconds. The Big Big Easy Chuck is available in two sizes: 12" and 16" Big Easy Jaw Extension's are available for use with the 16" Big Easy Chuck.