The J Dewey Rods .17 Cal #5-40 male bore brush is a precision-engineered cleaning tool designed for maintaining the integrity and performance of .17 Cal firearms. This bore brush features a #5-40 male threaded end, ensuring compatibility with a wide range of cleaning rods. Constructed with high-quality materials, the brush provides durability and effective cleaning action, removing fouling and debris from the bore with ease. The bristles are specifically designed to reach into the grooves of the rifling, ensuring a thorough clean without damaging the firearm's interior surfaces. Ideal for both professional gunsmiths and firearm enthusiasts, the J Dewey Rods bore brush is an essential component for maintaining optimal firearm performance and longevity. Constructed with high-durability nylon bristles and a robust brass core for enhanced performance and longevity 5-40 male thread specifications Extended length bore cleaning brush for rifles