The "SPECIAL LINE"™ BRASS CORE BORE BRUSH by BROWNELLS is designed to prevent barrel scratches during cleaning, with a one-piece brass shank and no-scratch brass coupling.
It features high-quality phosphor bronze bristles for efficient cleaning and longevity, tailored for 20 Caliber (.204) rifles.
These brushes have 5-40 TPI suitable for .17 and .20 caliber rifles, ensuring compatibility with specific thread requirements.