There are 3 holes on the jaw. Which allow you to position the hook correctly as follows:
Top #2 to 4/0 Mid #16 to 2 Bot #28 to 16 all of this is covered in the instruction sheet for the vise. Incorrect positioning can & most likely will damage your vise. When the hook is mounted the jaws should be parallel. When adjusted correctly a small hook let's say #16 should be held tight enough by just the small top screw to tie on. Which is great you can just pop the hook in and pull it out when you are done. Large hooks may take 3 or 4 turns of the large bottom screw to be held tightly. I tie a full range of sizes form a #32 to a 4/0. Bob H
