The Brownells #5-40 male special line bore brush is a precision-engineered cleaning tool designed for optimal maintenance of .17 Cal firearms. This product is specifically crafted to ensure thorough cleaning of the bore, enhancing the performance and longevity of both pistols and rifles. Each brush in the pack of 12 features a #5-40 male thread, ensuring compatibility with a wide range of cleaning rods. The brushes are constructed with high-quality materials to provide durability and effective removal of fouling and debris. This specialized line bore brush is an essential component for firearm enthusiasts and professionals seeking to maintain the accuracy and reliability of their .17 Cal firearms. Phosphor bronze bristles, known for their superior conductivity and corrosion resistance, are engineered to optimize performance in demanding electrical and mechanical applications Brass, looped and wound shank