Set includes:(1) .25 Cal. Rifle Bore Brush – Brass Core and Bronze Bristles (Benchrest Type)(1) .24-27 Cal. Cotton Bore Mop Features: Brush:Pro-Shot Bore Brush – Precision Engineered Design, Fit, & FunctionSuperior Stiff Bristles with extra thick fillPrecision Rifle #8-32 ThreadsMade in USA Bore Mop:Pro-Shot Exclusive Quick Clean/Mop Design100% Cotton Thick FillAmerican Standard #8-32 ThreadsMade in USABrush Thread Information: All Pro-Shot Brushes are Mfg. with American Standard Threading.17 and .20 Cal. – #5-40 thread Rifle and Pistol – #8-32 threadShotgun – #5/16-27 thread More information: .25 Cal. Rifle Bore Brush – Brass Core and Bronze Bristles (Benchrest Type)Pro-Shot manufactures superior bore brushes for shooters to withstand frequent use. Construction consists of a high-quality brass core and coupling with extra thick bronze bristles. Over the year these brushes have been used to set world records across the world. With exceptional bore cleaning ability, they are also a safe for your bore. All Pro-Shot Benchrest Bore Cleaning Brushes are specifically sized for each caliber/mm, with each brush being over-sized for extended life and maximum cleaning power! —.24-27 Cal. Cotton Bore Mop100% Cotton Bore mop made with a brass core. They are made of the highest quality construction possible. Mops can be used for quick cleaning and bore lubrication. Mops are especially excellent when using oil for bore lubrication because they create foaming action that helps in the lubrication process.