• Special designed for chasing spark plug threads from inside the cylinder
  head and working outward.
• Use the good threads at the base of port.
• Reduced dirt and metal debris from being driven into the cylinder head.
 

• Special designed for chasing spark plug threads from inside the cylinder
  head and working outward.
• Use the good threads at the base of port.
• Reduced dirt and metal debris from being driven into the cylinder head.