Product review (1 stars): As described 17mm thread
The R134 Refrigerant can tap is the part of the description that isn't correct.

R134 refrigerant cans in this country are threaded 1/2" Acme. I don't know what country uses the 17mm but it is useless in the USA.

Just didn't hassle returning it, ordered one from another source. If not allowing Amazon to make it right is unfair because I wrote this negative review, sorry, I know buying on line is tricky, My bad.