It is different for the work ones, but I was looking at my 1/2 socket set at home. It has evolved over the years from pieces of the work sets. When I looked I had a 21 piece socket set made up of the following brands.
1. John Deere
2. Craftsman
3. Proto
4. Proto Challenger
5. Thorsen
6. Wright
7. Vlchek
8. Kobalt
9. SK
10. Cornwell
11. Truecraft - Japan
12. New Britian
Too bad I looked, the siren call of a new tool set will most likely try to catch me.
1. John Deere
2. Craftsman
3. Proto
4. Proto Challenger
5. Thorsen
6. Wright
7. Vlchek
8. Kobalt
9. SK
10. Cornwell
11. Truecraft - Japan
12. New Britian
Too bad I looked, the siren call of a new tool set will most likely try to catch me.