The Renzetti R-Evolution Magnum Hair Stacker, designed by Pat Ehlers, is crafted for tiers who work with larger fly patterns and require extra capacity for aligning long or thick hair fibers. This magnum version quickly and efficiently stacks fibers, producing uniform, straight hair tips for clean, professional-looking flies. Its ergonomic design provides comfortable handling, even during extended tying sessions, while the durable construction ensures reliable performance over time. Perfect for streamers, saltwater patterns, and other large flies, the R-Evolution Magnum Hair Stacker combines expert-tier functionality with Renzetti's signature quality. Designed in collaboration with Pat Ehlers, it provides precision, efficiency, and consistent results for tiers seeking professional-grade tools.