Archived from the Tools In Action forum (Hand Tools). This thread is read-only.
Have you seen this before? I have a 5/16 1210-W Proto combo wrench that is obviously not 5/16″ It is slightly larger than 1/2″ and smaller than 9/16″. I’m saying it is 13mm. I contacted Proto to see if it was British Standard and they said no.
TGPB wrote:
1 hour ago, TGPB said:Have you seen this before? I have a 5/16 1210-W Proto combo wrench that is obviously not 5/16″ It is slightly larger than 1/2″ and smaller than 9/16″. I’m saying it is 13mm. I contacted Proto to see if it was British Standard and they said no.
Probably it has been stamped with a wrong number, it happens sometimes, I had a lot of German made screwdriver bits stamped wrongly.