Chrome Plated Allen Head Bolts to suit Chevrolet Small Block V8 265-400 Engine. This kit is designed for Steel/Tin Valve covers. The bolts are 1/2" long. Kit contains 8 bolts with washers. Longers bolts are available, should you have Alloy Valve Covers. Part Numbers 8758 if you need 3/4" long and 8758L if you need 1" Long