586-226200 Features: -Corner clamp is perfect for picture frames and smaller projects.-Opening Size: 3 in.-Price is for 1 Each.
Amazon.com
The Irwin Quick-Grip 3-Inch Corner Clamp is especially good for making picture frames and other small projects. It can hold 200 pounds of pressure while protecting your work piece with nylon rounds. A composite metal body and steel screws create a strong clamp that's backed by Irwin with a lifetime warranty.