i already have a pretty good metric set, what i was asking is if i got the metric sizes that are size.5 will i even need sae stuff? for now i have all of these in deep and shallow sockets, all are 6points. i probably dont need to but i want to get the exact same thing but in 12 points sockets.

1/4 - 5-14mm
3/8 - 10-19mm
1/2 - 12-21mm

then i have 7-19mm reversable ratcheting wrenches, and 7-19mm normal wrenches

ive spent quite a bit just on the wrenches and sockets, but now thats started my little took box i want to get all standard too, still some metric stuff i want to get, but 26+ dollars for a 20, or 21mm wrench it can wait till i need it.