One more thing I might relate,
If you rely on knife weight to do the sticking for you because you throw fairly slowly, these are probably not for you. But if you are a fast thrower anyway and can really nail a target hard at ten feet, the slightly reduced weight isn't even very noticeable. Keep in mind, I throw almost entirely No-spin. I have thrown them a few times at 6 or 12 feet spinning. But at any real distance I'm going to sail them. And I can stick them into low targets about 50% of the time out at 30-35'. So I have no complaints except rough looking exteriors.