Strong and stable copper collet chucks designed for accuracy gripping and long lasting in demanding rotary tool applications, featuring a brass layer for enhanced erosion resistance Perfect for metal fabrication projects, accuracy carving tasks, automotive maintenance, and industrial grade polishing operations where shaking control and tool stability are critical Ideal for professional mechanics, enthusiasts, and woodworking specialists requiring secure bit retention for high speed rotary tools in workshops or home garages Engineered with a bright copper plated cores and standardized 4.8mm (0.19") inner diameter compatibility, this power tool accessory seamlessly integrates with drills, electric grinders, and hose mounted polishing systems for reduced slippage during extended use, this copper collet chucks ensures consistent transmission while maintaining compatibility with general rotary tool accessories across multiple brands, Manufacturer: HUAJINGKEJI