I bought two sets of these clamps. Good bang for the buck. Used for some carpentry work to hold trim pieces in place while the glue dries. Pretty good quality overall, solid/strong downforce, little forward/reverse tension/part displacement when clamp is off-center. I'm glad they are composite plastic/rubber with steel springs rather than solid steel, should have fewer rust issues and should last longer. Composite feels like glass fiber reinforced nylon, nice and tough.