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-forged CR-V hard steel for exceptional strength and durability. The black plated finish enhances rust and corrosion resistance and prevents peeling of the outer layer, ensuring longevity and reliable performance under various conditions. Optimized Design: Engineered for safety and efficiency, the sockets feature durable teeth that provide a secure grip and prevent slippage during installation. Each socket has undergone a rigorous 72-hour salt spray test to guarantee 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 Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.