If you already have a Revolution Vise, then you can change out the vise head to one of the other available options without the expense of a whole new vise So, you need to tie on some really humongous hooks? Look no further than the Monster Vise Head. This bad boy features deeper hook grooves, great for saltwater, predator flies, huge bass bugs, Atlantic salmon hooks or any huge irons. Holds 1/0 to 8/0. When you need to tie something really big, the Monster&&';;s got your back.