What it is The Hareline Stonfo Parachute Attachment is a vise add-on built from stainless steel that gives you a small, rounded support right where you need it at the hook. It adjusts in multiple directions so you can park it beside the shank and change angles as the fly develops. On the bench it acts like an extra hand for keeping things controlled while you work. What to tie with it Use it to support parachute hackle while you wrap, and to steady a posted wing so the post stays upright instead of leaning or twisting. It’s also handy as a place to rest your bobbin between turns when you’re working around a parachute post and want to keep thread tension consistent. Any time you’re tying parachute-style dries and need clean, even hackle wraps, this attachment helps keep the workspace open around the post. Flies and the fish they're for This is a tool for parachute dry flies, which are commonly fished for trout on rivers and spring creeks where a low-riding mayfly profile and high visibility matter. Parachute patterns are also standard fare for panfish and small bass on ponds and slow water when they’re eating small surface insects, because the same posted-wing, wrapped-hackle silhouette reads as an easy bug on top. If you tie and fish parachutes regularly, you’ll feel the benefit most on small hooks where crowding around the post is what slows you down. How it compares It’s not a jaw set, so it won’t change what hook sizes your vise can hold or how strong the jaws clamp. It’s strictly an attachment for positioning and support while you tie.