The WorkPro 4-Inch Quick-Release C Clamp is perfect for holding pieces together while glue sets or for other repairs where you need an additional hand. And great for light duty welding, fabrication and woodworking. They are appropriate for many small jobs around the home workshop as they are light and strong.Its adjustable jaw opening accommodates pieces of wood and other items while the cast iron frame offers long-lasting durability. A steel swivel and screw provide a secure grip on a wide range of surfaces. With nickel plating, the threads resist rust and turn smoothly for easy adjustments. This 4-inch C clamp also features a convenient quick-release button for fast removal of work pieces. Suitable for a wide range of projects, it's useful for jobs in the workshop, at contractor sites and more.