Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I reach for these first

I have several of the Bessey K-Clamps and while I like them allot, I always seem to reach for the Uniclamps. I probably wouldn't have bought them myself and received as a gift. I came to discover that they are light, powerful, easy to adjust and perfect for everything from clamping boxes to clamping up an edge glued top. I have bought others to add to the fold and now only use the K-clamps when I've run out of these.Edit as of Dec 2012: I've changed the rating from 5 to 2. The reason isn't that I don't find them handy, but rather that I'm noticing that they seem to have a shelf life of sorts. What I mean is that I've always used them for light clamping tasks (boxes, etc), but have thrown three away lately because they don't engage anymore. I've kept them free of glue and the bar still has serations, but the clamp portion won't catch them anymore. That makes them unusable.