Oneway Stronghold Chuck #4 Jaws, Profiled are designed with the mass and size needed to securely turn large bowls and vases. These profile-shaped jaws provide maximum gripping power, ensuring stability and precision during your woodworking projects. The set includes four jaw segments that versatility and strength. With an external compression chucking capacity ranging from 4-1/4" to 5-3/4" and an internal expansion capacity from 4-7/8" to 6-1/2", these jaws are i for a variety of turning tasks, making them a reliable choice for both hobbyists and professionals. Model Number: 3222