Aerospace Aluminum Construction: Made with aerospace aluminum alloy and 304 stainless steel brushes, this set is oxidation- and heat-treated for high-torque resistance, ensuring a long lifespan under professional conditions. Innovative Threaded Bottom Lock System: This -base design ensures secure brush fixation and allows for tool-free brush replacement. Side rivets and an internal locking mechanism prevent rotation during use, ensuring consistent performance. Complete 3-Size Copper Pipe Cleaning Kit: Includes 1/2", 3/4", and 1" copper pipe cleaners with sizing marks for perfect alignment. Each set features a dedicated brush installation tool for safe, -edge-free blade changes. Dual-Use Design with Drill & Manual Modes: Features a 1/4" hex shank compatible with drills and manual operation. Detachable shank for tight spaces and work, enhanced by a knurled grip for superior control in hand use. Versatile Multi-Industry Application: Essential for solder prep, rust and paint removal, and maintenance across plumbing, refrigeration, AC repair, and industrial projects. Cleans copper, aluminum, iron, and HVAC metal pipes efficiently., Weight: 0.77823178486 pounds, Manufacturer: NONDK