Professional choice,quick removal of spline lug nut,improve your tire replacement efficiency,avoid unsuitable tools when removing the wheel accidentally cut your wheels or tires. 6 Spline Lug Nut Socket Key Replacement. Compatible with 6-sided Spline Type Tuner Locking Lug Nuts with smaller diameter. Typically 12x1.5, 12x1.25, 1/ 2 "x20 threads. 2 "x20 threads. 7 Spline Lug Nut Socket Key Replacement. Compatible with 7-sided Spline Type Tuner Locking Lug Nuts with smaller diameter. Typically 14x1.5,14x1.75. 14x2, 9/16"-18 threads. We focus on providing you with the most practical and economical auto repair tools and are proud to offer our dealers and owners unlimited convenience. Material - Crv steel Size - 6 spline lug nut socket total length: approx. 88mm/3.46 inches,ID: 17.5mm OD: 20mm,edge thickness: approx. 1.6mm/0.06 inches. 7 spline lug nut socket total length: about 88.5mm/3.48 inches,ID: 18.5mm OD: 23mm,edge thickness: about 2.5mm/0.1 inches. Weight - 4.77oz/6.57oz Features - Made of Crv steel, strong and durable, same or even more than the original quality. Specially designed spline jam nut, compatible with most six spline/seven spline jam nuts on the market. Caution: Please check the size and applicable model to fit your car before purchase. All dimensions are measured by hand and there may be small deviations.