I trusted what the original posting's description says. It says 12mm. No matter what country you live, 12mm is not 13,4mm, I just wasted my money,
Verified purchase: Yes | Condition: New
Only negative point is no instruction or details of tapping drill size needed and best method of use.
Verified purchase: Yes | Condition: New
Very well made and easy to use, plus a terrific value!
Verified purchase: Yes | Condition: New
Worked perfectly on my aluminum head. Go slow and use plenty of lubricant.
Verified purchase: Yes | Condition: New
This is a great tool that worked a dream and simple to use. *****
Verified purchase: Yes | Condition: New
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