HMH Interchangeable Vise Jaws

Which HMH jaw is best for me?

Omni Jaw
If you tie flies ranging mostly in size from #16 to 4's or 6's, the Omni jaw is perfect for you. Its tapered nose gives you excellent access to the smaller hooks; for larger and longer hooks, the Omni gives you plenty of steel towards the rear of the jaw to get a strong grip. The Omni's gape will accept 2/0 and some 3/0 or even 4/0 hooks, depending on the degree to which the manufacturer flattens the hook wire at the bend. At the other extreme, if you occasionally tie flies down to 20 or smaller, the Omni is still very good because it's small nose gives you plenty of access to those hooks for tying.

Micro Jaw
If you tie a lot of flies #20 or smaller, or if you tie small hooks for extended tying session, then you should seriously consider the Micro jaw. The Micro's needle nose is perfect for holding small hooks and gives you better access to the tiniest hooks than any other jaw on the market. It is a specialized small hook jaw and will make those tiny midge patterns much easier to tie. Please note: do not use the Micro jaw for hooks larger than #18. The Micro is not designed for larger hooks, and clamping larger hooks in the Micro could 'spring' the jaw, and will void the guarantee.

Magnum Jaw
If you tie mostly large patterns, whether for salt or freshwater, or are tying lots of large streamers, deer hair flies, etc., even on hooks as small as 10's or 12's, then you should own the Magnum. The serrated Magnum has a huge gape and will accept hooks up to 10/0. At the other end of the scale, it's slightly rounded profile still makes it easy to access and tie on hooks as small as #10, #12 or even #14 depending on hook style.