Quick connector designed for high compressive strength, corrosion resistance, and reliable performance. Easy and fast to install without tools. Simply slide back the collar, insert the fitting, and push the collar forward to lock securely. Enables quick connection and disconnection of tools and air lines. Features: - Color: Silver - Material: Nickel-plated iron - Dimensions: 4.50 x 2.00 x 2.00 cm (1.77 x 0.79 x 0.79 inches) - Constructed from heat-treated, hardened iron with a nickel-plated finish for enhanced rust and corrosion resistance - User-friendly design: slide collar back, insert fitting, then slide collar forward to lock - Spring-loaded quick release coupler with built-in shut-off valve to stop airflow when switching tools - Compatible with air compressor systems and airline hoses - Allows tool-free connection and disconnection of air lines Packing list: 10 x Coupling