15PCS M10 X 1.0 Helicoil Type Metric Thread Repair Insert Tool Thread Inserts

15PCS M10 X 1.0 Thread Repair Tool Helicoil Type Thread Repair Stainless Wire Inserts Kit. Thread size: M10 X 1.0mm. Thread tap and the drill material: HSS (High-speed Steel). To repair a spark plug thread no Pre-drilling is necessary if using the special Spark Plug Tap.

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