If you are using slip on spacers, it is recommended to change your studs to accommodate for the loss of thread on the standard studs. Wheel studs are an important part of your car, don't overlook the fact that even a 5mm slip on spacer can still create excess stress on your studs. Specs: - 13.0mm spline (refer to below spreadsheet for fitment guide) - 0.78" (20mm) in length over factory wheel studs - M12x1.25 thread - Strong Grade 10.9 studs - Sold as a pack of 10