Versatile Fitment: This socket set includes 6 and 7 spline lug nut socket keys, compatible with various 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 compatibility across multiple vehicle models. Robust Construction: Made from cold-hardened steel for exceptional strength and durability. The black plated finish enhances rust resistance and prevents peeling of the outer layer, ensuring reliable performance under demanding 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 spray test for extended service life compared to standard 48-hour tests. Comprehensive Specifications: The 7 spline socket measures 20mm (ID) by 23mm (OD), 90mm in length with a 43mm depth. The 6 spline socket measures 18mm (ID) by 20.5mm (OD), 70mm in length 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 items listed are included. Note: Due to lighting and display differences, the color in the image may vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.