I am a bit reluctant to step into these waters but what the heck. I was going to post this in the Bahco 80 Tooth Ratchet thread but decided to post a new thread.
Some COO information from a U.S. Customs & Border Protection brochure:
General Information
Every article of foreign origin entering the United States must be legibly marked with the English name of the country of origin unless an exception from marking is provided for in the law.
What is the country of origin?
The country of manufacture, production, or growth of the article.
Does altering the article in a second country change the country of origin?
The country of origin of an article may be changed in a secondary country if one of the following occurs:
1. If the further work or material added to an article in the second country constitutes a substantial transformation. A substantial transformation occurs if a new article with a different name, character, and use is created.
2. For a good from a NAFTA country: if under the NAFTA Marking Rules (19 CFR Part 102) the second country is determined to be the country of origin of the good.
Are there other articles not required to be marked with the country of origin?
Yes, the following:
1. Articles valued at not more than $200 that are passed without the filing of a customs entry.
2. Articles brought into a foreign trade zone or a bonded warehouse for immediate exportation or for transportation and exportation.
3. Products of American fisheries which are free of duty.
4. Products of possessions of the United States.
Special Markings on Certain Articles
The following articles and parts thereof, unless otherwise subject to the marking exceptions provided for in 19 U.S.C. 1304, must be marked legibly and conspicuously with their country of origin by die-stamping, cast-in-mold lettering, etching (acid or electrolytic), engraving, or by means of metal plates which bear the prescribed marking and which are securely attached to the article in a conspicuous place by welding, screws, or rivets:
Knives, forks, steels
Cleavers, clippers, shears
Scissors, safety razors, blades for safety razors
Surgical instruments, dental instruments
Scientific and laboratory instruments
Pliers, pincers, nippers and hinged hand-tools for holding and splicing wire
Vacuum containers and parts of the above articles
Some COO information from a U.S. Customs & Border Protection brochure:
General Information
Every article of foreign origin entering the United States must be legibly marked with the English name of the country of origin unless an exception from marking is provided for in the law.
What is the country of origin?
The country of manufacture, production, or growth of the article.
Does altering the article in a second country change the country of origin?
The country of origin of an article may be changed in a secondary country if one of the following occurs:
1. If the further work or material added to an article in the second country constitutes a substantial transformation. A substantial transformation occurs if a new article with a different name, character, and use is created.
2. For a good from a NAFTA country: if under the NAFTA Marking Rules (19 CFR Part 102) the second country is determined to be the country of origin of the good.
Are there other articles not required to be marked with the country of origin?
Yes, the following:
1. Articles valued at not more than $200 that are passed without the filing of a customs entry.
2. Articles brought into a foreign trade zone or a bonded warehouse for immediate exportation or for transportation and exportation.
3. Products of American fisheries which are free of duty.
4. Products of possessions of the United States.
Special Markings on Certain Articles
The following articles and parts thereof, unless otherwise subject to the marking exceptions provided for in 19 U.S.C. 1304, must be marked legibly and conspicuously with their country of origin by die-stamping, cast-in-mold lettering, etching (acid or electrolytic), engraving, or by means of metal plates which bear the prescribed marking and which are securely attached to the article in a conspicuous place by welding, screws, or rivets:
Knives, forks, steels
Cleavers, clippers, shears
Scissors, safety razors, blades for safety razors
Surgical instruments, dental instruments
Scientific and laboratory instruments
Pliers, pincers, nippers and hinged hand-tools for holding and splicing wire
Vacuum containers and parts of the above articles

Ibtl
Why would this thread be locked?