Elroy...................currently has two full sets 1/4 metric in his inventory but they're mismatched pawn shop examples. Elroy has reached the point where he deserves a "matched set". Current inventory runs from 4 mm through 13 mm and includes both 4.5 and 5.5 mm sockets.
Elroy has advised and that a confession and sincere apology is warranted here. Elroy took a closer inventory of his in stock 1/4" drive metric sockets and discovered nearly (5) complete sets of sockets. With this accurate accounting, Elroy determined that additional sockets in this category was unwarranted
HOWEVER
Recent projects revealed to Elroy that what he really needed to augment was his metric "hex key" driver inventory as any consideration of his 1/4" drive socket inventory being deficient was simply foolish. With this fact in mind combined with Elroy's fondness for Proto, he made this selection of metric Allen bits
https://www.grainger.com/product/PROTO-Forged-Alloy-Steel-Socket-4JW05Elroy's discounted cost of $78.12 sealed the deal.
Elroy was poised to purchase the 13 piece SK socket set but it simply wasn't a wise move. Elroy sincerely apologies for the false alarm.