This clipper is a big scissors, that's all. There's no rotation of the blades relative to the handle, as the ad on Amazon says. My pair is OK, but the spring is a real workout machine, and I'm wondering how to lighten it a bit. I find that the shears gum up with grass juice very quickly, and then the blades bind (won't open with the spring). I carry a wrung-out rag while I'm trimming and wipe the blades quite often to keep them free of drying grass juice. This works, and I'm able to keep on snipping for as long as I want. The shears are sharpenable, and the construction seems strong. I really would like to ease that spring -- that stiff spring is really my only beef with these.