Kreg Automaxx 6" Face Clamp Auto Adjust™ technology automatically adjusts to any thickness. Clamps materials up to 4-1/4" thick Easy-to-regulate clamping pressure using a simple thumbscrew Extra-large clamp faces spread clamp pressure evenly Ergonomic padded grips prevent hand fatigue Heavy-duty all-metal construction Compatible with Kreg Jig®, Kreg Portable Base, and Kreg Jig® Jr. These clamps feature new technology that adjusts the clamps automatically, eliminating the need to readjust the clamp for every change in material thickness. Just squeeze the padded handles and the clamp locks closed, no matter what the thickness. Automaxx™ Face Clamps also feature easy-to-regulate clamping pressure that you can simply set and forget. Auto Adjust technology maintains the desired pressure every time. In addition to these great features, Automaxx™ Face Clamps feature extra-large clamp faces, comfortable padded handles, and heavy-duty construction. Kreg Automaxx 6" Face Clamp Auto Adjust™ technology automatically adjusts to any thickness. Clamps materials up to 4-1/4" thick Easy-to-regulate clamping pressure using a simple thumbscrew Extra-large clamp faces spread clamp pressure evenly Ergonomic padded grips prevent hand fatigue Heavy-duty all-metal construction Compatible with Kreg Jig®, Kreg Portable Base, and Kreg Jig® Jr. These clamps feature new technology that adjusts the clamps automatically, eliminating the need to readjust the clamp for every change in material thickness. Just squeeze the padded handles and the clamp locks closed, no matter what the thickness. Automaxx™ Face Clamps also feature easy-to-regulate clamping pressure that you can simply set and forget. Auto Adjust technology maintains the desired pressure every time. In addition to these great features, Automaxx™ Face Clamps feature extra-large clamp faces, comfortable padded handles, and heavy-duty construction.