Flywheel Bolt Kit by ARP These premium-grade ARP Pro Series flexplate bolts are far superior to OEM hardware. Forged from aerospace alloy and heat-treated prior to thread rolling and machining, they feature an exclusive, flat 12-point head design and a larger-than-stock shank diameter for increased strength and improved register. Features Fastener Material: Chromoly Fastener Finish: Black oxide Fastener Head Style: 12-point Thread Size: M10 x 1.0 Underhead Length (in.): 1.275 in. Fastener Tensile Strength (psi): 180,000 psi Washers Included: Yes Benefits Forged from aerospace alloy Heat-treated prior to thread rolling and machining Applications 2008 – 2010 Ford F-250 2008 – 2010 Ford F-350 2008 – 2010 Ford F-450 2008 – 2010 Ford F-550 What\’s In The Box? 10 – Bolts Warranty Manufacturers Standard Warranty