Open end acorn design with cone seat9/16" total heightFits vehicles with wheel studs requiring a 7/16"-20 thread and wheels that take a conical 60 degree conical taperCr+3 zinc plated steelInstalls with a 3/4" socketReplace your worn, stripped, or missing lug nuts with a set of these 7/16" open end acorn style lug nuts. Carbon steel that meets SAE automotive industry standards for strength and durability.