I tie on a PEAK vise it has 3 different jaws , I do not remember what they say on hook size compared to jaw size but I use standard jaw from #1/0 down to a size 16, midge jaw for everything below 16 and saltwater jaw for 2/0 and up but I have been looking at a ANVIL APEX vise that they say will adjust from 6/0 all the way down to a size 30. I also tie flies while at a bass pro fly tying a few weeks ago i tied some #18 zebra midges and I do like the vise. so when I decided to get a new vise this is the one I will consider first