Ultimate Durability: tungsten construction specially treated to preserve its mechanical properties in all conditions of use, ensuring durability and longterm reliability. Creative Flexibility: Unique combination of modular sizes (2.3 mm / 2.8 mm / 3.3 mm / 3.8 mm) allowing innovative combinations for fly tying. Controlled dimensional variations offer possibilities for balancing and customizing lures. Precise Fit: Calibrated sizes (3.8mm/812, 3.3mm/1214, 2.8mm/1416, 2.3mm/1618) providing an ideal balance between hook and tungsten bead for reliable and consistent fishing performance. Optimized Versatility: These tungsten beads are ideal for beginners and experienced anglers, providing a onestop solution for tying flies. Their compatibility with fishing styles (nymphage, streamer, etc.) and casting techniques makes it easy to improve your configurations while meeting the specific needs of each angler. Use scenarios: Nymph patterns: Use 3.8mm with hooks in size 812 or 3.3mm with size 1214 to create balanced bead heads that promote stable sinking and natural lure profile. Streamers and larger flies: Use 2.8mm with size 1416 or 2.3mm with size 1618 for added weight with minimal bulk, improving casting control and sink in varying currents. Beginner or multitechnique setup: A complete range of sizes supports tying nymphs, emergers, and streamers across different water depths and conditions, enabling quick experimentation and configuration adjustments.