Chrome Plated Allen Head Bolts to suit Holden 6 149-161-173-179-186-202 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 8752T if you need 3/4" long and 8752L if you need 1" Long