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21 piece combination set for SAE Standard and Metric sizes to 1/2" and 12mm with socket and T-Bar

Sizes:
1/4-20    6mm-1.0
1/4-28    7mm-1.0
5/16-18  8mm-1.0
5/16-24  8mm-1.25
3/8-16    9mm-1.0
3/8-24    9mm-1.25
7/16-14  10mm-1.5
7/16-20  19mm-1.25
1/2-13    11mm-1.5
1/2-20    12mm-1.5  12mm-1.75