Quote Originally Posted by fly-chucker
From what I remember about the directions that came with my vice the three holes that hold the head to the arm are for adjusting the jaws to hold diifferent size hooks one hole for 3/0 - ?? another for "medium" size hooks and the other for the small ones ??-28. To make the hook line up on the center line you'll need to change the point at which you attach the hook in the jaws. If you are currently placing the jaws someplace behind the barb on a size 14 and it's centered, you'll need to place the jaws higher up on the bend if you switch to a size 10 to keep it centered.
Correct, to a degree. Hole closest to hook would be used for larger hooks (such as 3/0+) as it drops the jaws farther from the axis of rotation, middle hole for most hooks, and bottom (closest to cam or clamp screw) for smaller hooks. Changing to the different holes raises and lowers the jaws making it easier to place hooks closer to in line with the axis of rotation. You should be able to place the hook in the vise with it aligned (or nearly aligned) with the axis of rotation with the jaws gripping the bend of the hook but not the hook point.

Daren