Sav-A-Thread is the easiest way to permanently repair stripped 14mm spark plug holes. 

• Three different insert lengths come with the kit to accomodate all spark plug reaches 
•  Positive mechanical locking feature means the insert will never come out! 
•  The piloted reamer tap means no drilling is necessary and perfect alignment of the tapped 
•  Includes: 14mm tap, insertion tool and (3) inserts.