33PCS Glow Plug Thread Restorer Repair Tool Cylinder Head Metric M8 M10 M12 M14

Tap: M8 x 1.0 / M10 x 1.0 / M10 x 1.25 / M12 x 1.0 / M12 x 1.25 / M14 x 1.25. Insert Driver: M8 x 1.0 & M10 x 1.0, M10 x 1.25 & M12 x 1.25. Includes four sizes of threaded adaptors suitable for common sizes of glow plug.

eBay