A longtime favorite among shooters, this virgin wool mop is perfect for applying bore cleaner or oil. It holds plenty of fluid, ensuring both ends of the barrel are evenly coated. The wool's natural resilience helps it follow rifling grooves, while the brass shank and coupling won't scratch your bore. Material composition includes wool fibers, brass shank and precision-engineered coupling components for enhanced durability and performance 2.87 inches length, 5/16-27 thread