Tetra Gun ProSmith mops are designed for superior quality and unmatched performance in firearm maintenance. Engineered to industry-standard specifications, these mops feature an 8-32 male thread (with 5-40 for .17 Cal. and .204 Cal. and 5/16-27 male threads for 12, 20, 28, and 410 Gauge), ensuring a precise and secure fit. Experience the efficiency of safe cleaning and lubrication with these durable and reusable mops. They are expertly crafted to effectively apply lubricants and cleaning solvents, absorbing contaminants with ease. The close tolerance specifications guarantee a perfect fit for your firearm's bore, providing unparalleled cleanliness and care with each use. Choose Tetra Gun ProSmith mops for a reliable and thorough firearm maintenance solution that professionals trust.