Perfectly aligned hair tips and butts make all the difference when tying premium flies — and the Renzetti R-Evolution Hair Stacker (X-Large) is the tool that helps you achieve that level of precision every time. Engineered by fly-tying legends Andy Renzetti and Pat Ehlers, this stacker is crafted from high-quality anodized aluminum for durability, smooth action and long-lasting performance at the tying bench.

Whether you’re building big streamer wings or robust predator patterns, aligning your natural hair and fibers consistently makes your patterns look better and fish more effectively. The X-Large size features a wider opening and longer tube to accommodate larger bundles of hair — ideal for tying flies like those in the Beast Flies range, where generous wing and tail profiles are key. Beast Flies often rely on aligning the butts of bucktail to make for a neater and more durable fly, and this hair stacker allows you to do that.

Using this stacker is simple: insert your cut hair tips (or buts) into the tube, place it in the stacker and gently tap against a firm surface — in seconds your fibres are neatly aligned and ready to be tied. With its ergonomic design and reliable build, this tool becomes an indispensable part of your fly-tying kit.

Key Features

• X-Large size: Wider bore and longer tube for big bundles of deer hair, elk hair and long fibres.
• Premium anodized aluminum: Lightweight but tough construction for consistent performance.
• Perfect alignment: Quickly straightens hair tips for cleaner tie-ins and better fly profiles.
• Essential for Beast Flies and streamer patterns: Helps you achieve uniform wings and tails on larger, aggressive fly designs.
• Made in the USA: Legendary craftsmanship from Renzetti’s fly-tying tool range.

This hair stacker is a go-to bench tool for serious tiers who tie everything from classic dry flies to Beast Flies and big predator streamers that demand volume and precision.