Usage Tips: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 1/2-20Inch threads, while the 7 spline key is suitable for M14x1.75 and M14x2, 9/16Inch-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 not only enhances rust and corrosion resistance but also 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 (13/16Inch) & 22mm (7/8Inch) for the 7 spline, and 19mm (3/4Inch) & 21mm (13/16Inch) for the 6 spline.<br > <br > Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black Material:Metal<br > <br > Package Contents: 1 * 6 SplineSocket Key 1 * 7 Spline Socket Key<br > <br > Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.