11 PCS Spark Plug Rethreading Set. Why Choose Our Spark Plug Rethreading Set?. -M14×1.25 & M16×1.25 Stainless Steel Kit. Kit includes 10 M14 × 1.25 thread inserts and 1 M16 × 1.25 thread tap. A functional tool kit designed for quick repairs of broken spark plug threads.
