MRG flex plate to crankshaft bolts are forged from high quality steel and heat-treated for extra strength, these grade 8 fasteners are a must for all hi-performance applications. Black plated finish helps resist rust and corrosion. Kits are complete with lock washers, where needed. Product Features:High Quality SteelHeat-Treated For StrengthGrade 8 FastenersResists Rust and CorrosionBlack Plated Finish