The REVOLUTION VISE combines the ultimate hook holding power of their famous head design, and true in-line rotary function. Their most versatile head is specifically built to tie saltwater and large fresh water flies from tarpon to bill fish, pike, musky, salmon and bass. It can accommodate hook sizes from size 22 to 5/0, and features two hook grooves machined into one side of the jaw. It holds large hooks extremely secure yet allows for tying hooks as small as size 22. From tarpon to trout, this is one great vise!