DIMENSION: high strength wheel bolt yellow zinc grade 12.9 FINISHING: BLACK ZINC PLATED YELLOW ZINC PLATED HOT DIP GALVANIZED Fits all GM LT Gen V series engines. M11-1.5 thread, 24mm length (OEM length, measured underneath head). Package Includes: 8 bolts 12.9 high strength bolts (factory bolts are 10.9 rated) wheel bolt 12.9 website:http://www.hualongfasteners.com/special-bolts/