7pcs Internal Spark Plug Rethread Tool
For cleaning and re-cutting spark plug or glow plug threads
Simple handling due to eccentric function
Special length for deep seated thread
Quick and low-cost thread repair
Centering shaft
With conical mounting shaft for thread repair sleeves
External hexagon drive
With knurled knob
Size: 
M8 x 1.0--115mm, M10 x 1.0--115mm, M12 x 1.25--140mm, 
M12 x 1.25--270mm, M14 x 1.25--140mm, M14 x 1.25--270mm, 
M18 x 1.5--90mm.