This is an Open-End Acorn Style Lug Nut for 7/16 inch studs. This quality Acorn Lug Nut features a cone style seat and an open-end design for popular GM applications when the center cap covers the lugs. These open-end Acorn Wheel Nuts use a 3/4" hex socket. Lug nuts sold individually and priced Per Each. Speak to a Tire Expert for more information about your antique vehicle's wheel and tire fitment needs. Accessory Code: DW