88013 7/8 – 18 SPARK PLUG REPAIR KIT IN A STEEL CASE Drill Size: 57/64Drill P/N: 81034 (sold separately)IncludesQuantitySizeInsert Length88024Tap17/8 - 1887035Install Tool188056Insert67/8 - 18.500"88058Insert67/8 - 18.625"