This is a set of eight optional HPI 4mm Steel Serrated Flanged Wheel Nuts, and are intended for use with the HPI Cup Racer family of vehicles. These Steel Serrated Flange Nuts are genuine HPI option parts that allow Cup Racer wheels to be mounted on HPI Mini cars and other Mini-size cars that use 12mm hex hubs. The serrated faces keep the wheels firmly attached.

Note: These nuts require a 7mm nut driver.