Time-Sert 1215 Metric Kit M12x1.5 Provided Insert length is 16.2 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 1215 thread repair kits are made in the United States. Time-Sert 1215 Thread Repair Kit Contains: Drill, Counterbore, Tap, Installation Driver, (5) Steel Inserts - Part # 12153 THIS IS NOT FOR A RECESSED THREAD HEAD BOLT REPAIR. PLEASE REFER TO MANUFACTURER KITS.