5/8" x 11 Course Steel lug nuts with Studs Single Sided lug nuts fit 1" socket 5/8" Course Wheel Studs with quick start feature Wheel studs are 3-1/4" long, .375 knurl, and .690 Knurl diameter Includes 20 Wheel studs & 20 Lug Nuts This wheel stud kit is intended for offroad use only and not meant for street vehicles.