Perusing CL, found an ad for a "15 pc Proto Metric wrench set, 7-32mm."
The set skipped a lot of sizes, and I just figured seller had lost them or something.
Turns out, it is an actual Proto wrench set. J1200P-MASD.
Includes: 7, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 29, 30, 32...