Our Breakthrough Clean Technologies Brass Patch Holders hold patches securely for application of Breakthrough Clean Technologies solvents and lubricants. Fits .17 caliber barrels. #5-40 thread for attachment to Breakthrough Clean Technologies stainless steel rods and cables.Product FeaturesGUN CLEANING SUPPLIES: This high-quality tool fits .17 / .22 Cal. barrels & securely holds gun patches for applying solvents & lubricants to help remove excess debris. It can help protect your firearm from corrosion, friction, & moisture.BORE CLEANER ATTACHMENT: This accessory is made from brass & is machined for various calibers, ensuring a precision fit. Each holder is stamped with the caliber & #5-40 thread, & will require an adapter for use with any standard cleaning rods.GUN PATCH HOLDER: Don't worry about damaging your gun; this durable attachment won't scratch yet is rigid enough for pushing through the barrel. It's an ideal gift idea for fellow firearm owners who need utility & flexibility.FIREARM ACCESSORIES: Pack our high-quality gun cleaning tool in your range bag, add it to your shotgun cleaning kit, or store it with your gun holder, accessories, & solvents. This product is ideal for equipment maintenance wherever you choose to use it.MADE IN THE USA.