these are the most outstanding and reliable bits of gear i have ever bought. In fact i would say that 4CU's are better than the dragon cams, the quality is exceptional. the teeth on the lobes and the cam stops are well defined and deep, the trigger is sharp and very responsive and when yo have a full rack the weight of them makes for a noticeable reduction in the overall weight of a rack. But to my mind the stem is the real gem as its flexible and will take a load which would snap a single stem cam. I tool a 30ft fall onto a single size 3 cam and it held solid.....