Review on Irwin Quick Grip 90 Degree 226410: The Ultimate Tool for Secure and Efficient Clamping by Jose Guzman

Overall this clamp works well; especially compared to cheaper products. I only had to use them for a multi-angle project. They worked relatively well, but you still have to be careful to align the corners properly. They don't align themselves. The single screw design is much better than competing twin screw design products. Not perfect, but a welcome addition to my other Irwin clamps.