10 Piece 1/2" Drive Standard Metric Socket Set, 6 Point, 10MM to 19MM. Cornwell calls the set STM3210.
Contains: TM3210, TM3211, TM3212, TM3213, TM3214, TM3215, TM3216, TM3217, TM3218, and TM3219
The 15mm is slightly used and is a bit of chipped chrome. The others have hardly been used at all...