Review on WETOLS Angle Clamp 2Pcs Woodworking: Precision Tool for Perfect Angles in Woodworking Projects by Jerardo Phi

This is a good working tool for light jobs, especially for DIY. Don't expect it to be "automatic". Adjust the connection at a right angle of 90 degrees (as seen in my picture) - you need to install the boards manually and tighten the screw carefully. The material is quite light, so it is not suitable for heavy and large boards (requires additional support).