TiTek Speed (long) Lug Nuts are made of 7075 Aluminum Alloy. They are one of the highest strength aluminum alloys, with a tensile strength of 83,000 psi. Because of its strength to weight ratio, they are commonly used for aircraft and aerospace technologies. Constructed for your vehicle, TiTek Lug nuts come in a series of matte colors such as black, red, blue, and gold.