Tetra's Tightly Wound Precision Brushes are designed to effectively remove fouling from gun barrels, ensuring optimal performance for your firearms. Each brush features the industry-standard 8-32 male thread (5-40 for .17 Cal. & .204 Cal.) and 5/16 male thread (12, 20, 28, and 410 Gauge), making them compatible with a variety of cleaning rods. Crafted with close tolerance specifications, these brushes provide a perfect bore fit, allowing for thorough and efficient cleaning. Their design ensures that they will not harm or scratch the steel of your gun barrel, maintaining the integrity and longevity of your firearm. Tetra’s brushes are the ideal choice for both novice gun owners and seasoned marksmen seeking reliable, high-quality cleaning tools.