JEGS 5/8" Screw-in Wheel Studs are designed to meet most sanctioning body requirements for extra long wheel studs when using thick-hub after market wheels that utilize an 11/16" hole diameter. For use with 'Drag Race' specific axles that utilize a 5/8"-18 threaded flange and wheels with a 1.250" recess (like most Weld Drag Wheels) or a flat lug nut surface. Our studs are manufactured from 170,000 psi, 4140 alloy steel to withstand high shear loads (acceleration shock), the rear jam nuts and lug nuts are grade-8 steel and the spacers are CNC-machined from 6061-T6 billet aluminum. Stud length measures 4-3/8" overall and 3-3/16" from the axle flange (stud shank) to stud end. .