General description This 20-piece wire brush set is designed for various cleaning tasks, including internal and external thread cleaning, cleaning drilled holes, and small bore holes. It includes different types of brushes suitable for various materials and applications, providing versatility for home improvement and DIY projects. Technical specifications Set includes 20 brushes: 6 nylon, 6 stainless steel, and 6 brass brushes Brush diameters: 9mm, 11mm, 13mm, 15mm, 17mm, 19mm Includes a 150mm magnetic extension Compatibility and accessories Compatible with various cleaning and threading tools Supplied with a soft grip magnetic handle Includes a canvas fold-up case for storage and transport Installation Attach brushes to compatible handles or power tools as needed Use the magnetic extension for reaching deep or hard-to-access areas Usage Ideal for cleaning threads, drilled holes, and small bore holes Suitable for use on different materials such as metal and plastic Ensure proper