I came across these at Masters in Roxburgh Park Victoria, so I'm not sure if it applies at other stores.
This is a 49 piece set of KOBALT brand "Xtreme Access" sockets in 1/4", 3/8" and 1/2". They are a clearance item and I couldn't find them on the website any more, so I guess it is whatever store stock you can find. Although they are KOBALT brand, these seem quite good quality and are highly chromed/polished and heavy. The "advantage" or novelty of the "Xtreme Access" is that you can use these sockets on nuts that are on a long bolt, allowing the excess length to poke through and not interfere with the socket as is normally the case. The set looks a bit like a ratchet ring spanner in the drive handle, with sockets to suit with pass-through. Even the extension bars have pass-through. There are also adaptors to convert the handle to standard ratchet drive if you want, as well as the obligatory padding with Philips, flat, hex and Torx drive bits.
The full set was $120 (or the tag said save $120, I got too excited to remember). Now $30.
They also have a separate 1/4"-only set in a case, now $10, save $5.
And a separate 3/8"-only set, now $20, save $10.
UPDATE: Thanks to Giteau
full set https://www.masters.com.au/product/100796085/kobalt-mechanic…
1/2" set https://www.masters.com.au/product/100796114/kobalt-mechanic…
3/8" set https://www.masters.com.au/product/100796106/kobalt-mechanic…
UPDATE 2:
Also found:
1/4" set https://www.masters.com.au/product/100796093/kobalt-mechanic…
for $10, save $20.
Forgot to add, these are universal spline sockets, so they will take metric or SAE in the same socket.