12x1.5 Spline Tuner Lug Nuts Wheel Locks (20 Lugs & 1 Key Included) (12mmx1.50 Thread Size) (Black) Spline tuner lug nuts are designed to fit aftermarket wheels that require a slim lug nut for tight lug holes. (20) Spline Lug nuts and (1) 6 spline tuner lug key is included. Dual 3/4" & 13/16" hex key. Please refer to the photo's for lug dimensions. Cold Forged. Lug nuts are heat treated and thru-hardened for max durability and tensile strength. Unlike other electro plated color lug nuts ours gives maximum resistance to color stripping.