Time-Sert 1010 Metric Kit M10x1.0 Provided Insert length is 1010 metric. 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 1010 thread repair kits are made in the United States. Time-Sert 1010 Metric Thread Repair Kit Contains: Drill, Counterbore, Tap, Installation Driver, (5) Steel Inserts - Part # 10103 THIS IS NOT FOR SPARK PLUG REPAIRS. PLEASE REFER TO SPARK PLUG KITS.