Megan Racing extended wheel studs are made with heat treated high strength chromoly steel. Lost of threading on stock studs can be a major safety issue, these extended studs are essential upgrade for added spacers or aftermarket thick-center wheels. These studs are intended to be used with open-ended lug nuts.Applications:- Scion FRS / Subaru BRZ 2013+- Package of 20 Extended Wheel StudsThread Size: 12mm x 1.25RHKnurl Size: 14.50mmThread Length: 52mmOverall dimension of stud (see diagram)D1: 18.75mmD2: 12.10mmD3: 12mmL1: 5.50mmL2: 8.50mmL3: 5.50mmL4: 62mm*Note: Recommended to be used with wheel spacers up to 20mm, 5-6 full turns of lug nut to secure with use of torque wrench.