Built from a proprietary forged steel alloy, these studs feature a 12.9 grade hardness with a minimum axial tensile strength of 260,000 lbs, delivering serious durability for track and race use. Designed specifically for F-Chassis applications, they convert the factory fine 14×1.25 thread to a more robust 14×1.5 thread, helping prevent cross threading and reducing wear on your wheel hubs from repeated installation and removal. Manufactured in the USA by a nuclear power plant supplier, they feature a wider stud body diameter for added strength while still allowing smooth nut engagement. The black zinc finish provides corrosion resistance, and the bullet nose design allows for quicker, easier wheel installation. The extended thread design supports up to a 20mm spacer, and installation is done using the double nut method. Each kit includes everything needed for all four wheels.