What it is
The Hareline Aluminum Hair Stacker is a precision-machined aluminum tool for stacking and squaring up hair. The smooth interior surface helps the hair slide and settle so the tips line up evenly, and the aluminum body is durable and resists warping.
What to tie with it
Use it to align hair fibers before you tie in hair wings and hair tails, especially when you want clean, even tips. It’s the bench tool you reach for when you’re measuring and matching hair, then transferring that stacked bundle straight to the hook without losing the alignment.
Flies and the fish they're for
A hair stacker is part of tying clean-tipped wings on classics like the Elk Hair Caddis, which is a go-to dry fly for trout in rivers and riffles. It also helps with patterns like the Comparadun for selective trout on mayfly hatches and Wulff-style dry flies that see a lot of use for trout and sometimes grayling in fast water. When you’re stacking and tying hair neatly, those dry flies float and track the way they’re supposed to, and that matters when fish are inspecting the silhouette.