# **Kylebooker DOUBLE PUPIL BRASS EYES – Hareline Fly Tying Dumbbell Eyes Barbell Beads NEW! – Are They Worth It?**
As an avid fly fisherman, I’m always on the lookout for high-quality tying materials that enhance my flies’ performance. Recently, I came across the **Kylebooker DOUBLE PUPIL BRASS EYES** by Hareline, a new addition to their fly-tying dumbbell eyes and barbell beads collection. The product promises durability, realistic aesthetics, and improved sinking capabilities—but does it live up to the hype? In this review, I’ll break down its features, performance, and overall value for money.
## **Product Overview**
The **Kylebooker DOUBLE PUPIL BRASS EYES** are designed for fly tiers who want a lifelike, weighted eye system for streamers, nymphs, and saltwater patterns. Unlike standard mono or plastic eyes, these brass dumbbell eyes feature a **double-pupil design**, adding a more natural look to baitfish and insect imitations. Additionally, they come in various sizes, making them versatile for different fly patterns.
### **Key Features:**
– **High-quality brass construction** – Ensures durability and corrosion resistance.
– **Double-pupil design** – Enhances realism, mimicking real fish eyes.
– **Barbell-shaped beads** – Provides better weight distribution for faster sinking.
– **Available in multiple sizes** – Suitable for small nymphs to large streamers.
– **Compatible with various tying techniques** – Can be used for Clousers, Woolly Buggers, and more.
## **Performance & Usability**
### **1. Realism & Aesthetics**
One of the standout features of these eyes is their **double-pupil effect**, which gives flies a more lifelike appearance. When tied onto patterns like Deceivers or Sculpins, they create a convincing illusion of movement, potentially triggering more strikes from predatory fish.
### **2. Weight & Sinking Ability**
Brass eyes are naturally heavier than plastic or bead-chain alternatives, making them ideal for **deep-water fishing**. The barbell shape helps flies sink quickly while maintaining balance in the water. I tested them on a Clouser Minnow, and the fly dove straight to the bottom with minimal false casting—perfect for targeting bass and saltwater species.
### **3. Durability & Longevity**
Unlike cheaper plastic eyes that chip or fade over time, the brass construction ensures these eyes **last through multiple catches and rough conditions**. Even after several outings, the paint remained intact, and the eyes showed no signs of rust—a big plus for saltwater anglers.
### **4. Ease of Tying**
The barbell design makes them easy to secure with thread wraps or superglue. However, beginners might find them slightly trickier to position compared to stick-on eyes. A dab of UV resin helps lock them in place for extra durability.
## **Price & Value for Money**
Hareline’s products are generally priced competitively, and the **Kylebooker DOUBLE PUPIL BRASS EYES** are no exception. While slightly more expensive than basic dumbbell eyes, the **enhanced realism and durability** justify the cost. A single pack lasts for dozens of flies, making them a solid long-term investment.
### **Pros:**
✔ Realistic double-pupil design
✔ Excellent weight for fast-sinking flies
✔ Durable brass construction
✔ Versatile for various fly patterns
### **Cons:**
✖ Slightly pricier than standard options
✖ Requires careful tying for proper alignment
## **Final Verdict: Are They Worth Buying?**
If you’re serious about **tying high-performance streamers and nymphs**, the **Kylebooker DOUBLE PUPIL BRASS EYES** are an excellent choice. Their **realistic appearance, solid weight, and long-lasting build** make them a valuable addition to any fly tier’s arsenal. While they may cost a bit more than basic alternatives, the **improved strike rates and durability** make them a **great investment**.
For anglers targeting **bass, pike, or saltwater species**, these eyes could be the difference between a slow day and a trophy catch. If you’re looking to upgrade your fly-tying materials, I highly recommend giving them a try!
**Rating: 4.7/5** – A premium product that delivers on performance and quality.
Would you like recommendations on the best fly patterns to use with these eyes? Let me know in the comments! Happy fishing! 🎣