I have used a bunch of them because when they are paired with a Warne one piece scope base they are the lowest setup you can get for scoping your Marlin levergun. I have never had a scope slip or move with them. I have stripped out the threads on a couple because I had to tighten and then loosen about 100 times to get the darn scope leveled correctly though.

Always remember that you are unique, just like everyone else.