Knives fit perfectly. As mentioned, I tightened them loosely and pinched them to make sure they fit properly. However, when I tried to tighten them with the supplied Allen key, I stripped the threads with pliers. I should have known this would happen as the tongs are made of aluminum which is a very soft metal. I solved the problem by dropping a drop of metal glue in the hole and tightening it. So far it seems to be holding up, but we'll see.