Features: The lock-on feature aims to provide a steady connection to the valve stem during inflation, which can help minimize air loss. The straight, long arm facilitates use on tires where space around the valve is limited, aiming to make the connection process more straightforward. This set is geared towards tire maintenance scenarios involving vehicles with large bore valves. The combination of the lock-on feature, extended handle, and specified thread connection aims to address common needs in inflating tires for off-road trucks, construction, and agricultural equipment. Specifications: Material: chrome-plated copper Color: metallic color Size: 5.4 inches Package includes: 2 x Large bore lock-on air chucks Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays