BESSEY 2-7/8 in. Capacity 90-Degree Corner Clamp with 1/2 in. Throat Depth WS-1 - The Home Depot
Rockler Clamp-It Corner Clamp Jig - Glass-Filled Polycarbonate Woodworking Clamps - Corner Clamps to Hold Panel Parts Together - Right Angle Clamp for Fastening Work - Woodworking Tools - Amazon.com
Corner Clamps for Woodworking Set of 4, 60 120 90 Degree Right Angle Clamp Jig Kit for Picture Frame Welding Drilling Drawer Carpentry, Adjustable Swing Quick Clamping Squares Corner Mate DIY Tool - Amazon.com
Corner Clamping Jig by drewdz | Download free STL model | Printables.com
Kreg Tool 90-Degree Corner Clamps - Pro Tool Reviews