Nismo wheel nuts are made from reliable steel and won't loosen even in extremely high temperatures in all forms of racing. These nuts with a smaller diameter were designed for use with wheels using small wheel nut holes, thus also reducing overall weight. These nuts are a ball seat lug nut type that keeps dirt and moisture out. This Nismo wheel nut design is offered in two sizes, Long (50mm) and Standard length (50mm). In the case of wheels using deep lug nut holes or long wheel studs the long 50mm type makes it even easier to install. The wheel nuts are 7-sided which is a very effective anti-theft device. A wrench adapter is included with the wheel nut set to mount and remove wheel nuts. - Chromoly Steel (SCM435) - M12 x 1.25 Pitch - Length = 50mm (Long Type) - Includes Wheel Nut Tool - Set Contains 20 Wheel Nuts