These tools use the better threads at the base of the spark plug port and greatly reduces the chance of debris from falling into the cylinder.

It chasers the thread from inside the cylinder head, working outward using the good thread at the base of the port. Use light grease on the end to trap filings and keep tool easy to use.

Set Contains:

• 12mm x 1.25P; 14mm x 1.25P; 18mm x 1.5P;
• 8mm x 1.0P; 10mm x 1.0P x 1000mm long;
• 12mm x 1.25P; 14mm x 1.25P x 250mm long.