The Renzetti R-Evolution Standard Hair Stacker, designed by Pat Ehlers, is a precision tool that ensures perfectly aligned hair tips for professional-looking flies. Engineered for consistent results, it quickly and efficiently stacks fibers, straightening them for smooth, uniform bodies. Ideal for a wide range of fly sizes, this standard version works well with most common fly patterns, from dries to streamers. The ergonomic design allows comfortable handling, while the durable construction ensures long-lasting use. As part of Renzetti's collaboration with expert tier Pat Ehlers, this Hair Stacker combines professional-grade functionality with thoughtful design, making it an essential tool for tiers seeking accuracy, efficiency, and consistently clean fly profiles.