This should be a 4 or 5 star knife except for the fact that the pivot screw would not budge. Consequently, no adjustment was possible. I don't know what kind of material was used on the threads, but they might as well have been welded into the blade - thoroughly disgusting and hopefully not a common occurrence. Otherwise, I liked the look and feel of this model but just don't recommend it if you have any hopes of adjusting or maintaining your knife.