Spark Plug Thread Repair Tool, Car Universal Carbon Steel Spark Plug Insertion Repair Tool Spark Plug Thread Tapping Tool For Sparking Plugs RepairPerfect Spark Plug Tool:A nice tool kit for repair damaged spark plug threads and lengthen spark plugs service time. Spark Plug Tool is Designed for professional auto mechanics and heavy duty applicationsPremium Materials:Spark Plug Tool is Made of hardened carbon steel, these accessories are of strong strength and long durability.With impeccable wear resistance, scratch resistance and non:fading.Four Size:Spark plug thread repair tools kit With four size of inserts for different 14mm thread size spark plugs.Suitable for:Brand new and high quality spark plug :thread tap and inserts. Spark Plug Tap Insert is Suitable for damaged spark plug threads,cleans and rethreads spark plug ports.Color: Black and SilverSize: screw regenerator 14mm*1.25mm, bushing size: M14*1.25 (length 9mm), M14*1.25 (length 11mm), M14*1.25 (length 16mm), M14*1.25 (length 20mm)Quantity delivered: 5 piecesWarm prompt:1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering.2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding3. Only the above package contents, excluding other products.