High clamping force. A bit cheap in a plastic handle. The damn ends will pop out if you don't align them properly. Overall they work great for the price. 2 hold the upper side windows of my Jeep YJ and 3 clips hold the rear window perfectly. There are holes in the handles that I hang on 16d nails. Some handles splintered at the holes when hung and nailed with 16d nails (holes are slightly larger so it's not a problem of a hole that's too small) if I didn't hold the clamp and prevent it from resting on the nail how I smashed it. in.