Description Time Sert 4412E M14 x 1.25 spark plug repair tooling Extended: For applications that require deeper reach into the head. The 4412E tooling works very well in holes 6″ deep or more. The installation is exactly the same for taper seat or washer seat you only need the appropriate length/style of insert. Kit does not include inserts order separately. 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 4412E thread repair kits are made in the United States. THIS KIT DOES NOT CONTAIN INSERTS. PLEASE ORDER YOUR INSERTS FROM THE LINKS BELOW.