ARP Pro Series ring gear bolts are forged from premium-grade 8740 chromoly steel and heat-treated to a rating of 200,000 psi. Theyre available in a variety of lengths and thread sizes for nearly two dozen axle applications. Specially hardened, precision-ground washers are also included, where required.Ring Gear Bolt Kit, VW 02A Ring Gear, 9mm ThreadFeatures:Head Style: 12-pointThread Size: 10mm x 1.25Underhead Length (in): 1.180 in.Fastener Yield Strength (psi): 200,000 psiWasher Included: Yes Fastener Material: Chromoly Fastener Finish: Black oxide Quantity: Sold as a set