Versatile Fitment: This socket set includes 6 and 7 spline lug nut socket keys, compatible with a variety of thread pitches including 12x1.25, 12x1.5, and M14x1.5. The 6 spline key fits 1/2-20 Inch threads, while the 7 spline key is suitable for M14x1.75, M14x2, and 9/16 Inch-18 threads, enhancing usability across multiple vehicle models. Robust Construction: Made from cold-treated hard steel for exceptional strength and durability. The black plated finish enhances rust resistance and prevents peeling of the outer layer, ensuring reliable performance under various conditions. Optimized Design: Engineered for safety and efficiency, the sockets feature teeth that provide a secure grip and prevent slippage during installation. Each socket has undergone a rigorous 72-hour salt test for a longer service life compared to standard 48-hour tests. Comprehensive Specifications: The 7 spline socket measures 20mm (ID) by 23mm (OD) and is 90mm long with a 43mm depth. The 6 spline socket measures 18mm (ID) by 20.5mm (OD) and is 70mm long with a 40mm depth. Both are designed to work with multiple hex sockets: 21mm (13/16 Inch) and 22mm (7/8 Inch) for the 7 spline, and 19mm (3/4 Inch) and 21mm (13/16 Inch) for the 6 spline. Color: Black Material: Metal Package Contents: 1 x 6 Spline Socket Key, 1 x 7 Spline Socket Key. Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement may vary by +/- 1-3cm.