Time-Sert 1810 M8 x 1.0 Metric Thread Repair Kit includes inserts with metric length of 11.7 mm Time Sert thread repair kits are approved by leading automotive manufactures. Time-Sert easily repairs stripped threads in cylinder head bolts, spark plug holes and oil drain pans as well. Many thread repair kits are available for your threaded bushing application in metric and American sizes. Time-Sert is the very best in thread repair! Time Sert 1810 thread repair kits are made in the United States. Time-Sert 1810 Thread Repair Kit Contains: Drill, Counterbore, Tap, Installation Driver, (5) Steel Inserts - Part # 18101