Things I liked: 4 of the bolts could not be tightened. Sharp Edges on mounts scratched the scope on install. High Rings with see through for less cost than others. Good Idea, Poor Execution.
Things I would have changed: Put bolts in the package that do not have damaged heads. Eliminate sharp edges.
What others should know: I would return these for a refund, but it's not worth the time and effort. Stick with Leapers for mounts. I threw away $20 by buing these...