tool to remove a pipe plug?

[Alaska Jim]

Yes there are some 4 point (or square ) sockets made just for this purpose in both male and female versions, although the female versions are only available in sizes smaller than either 1/2 or 3/8" I cannot remember without going out to the shop and looking. when you get into the larger sizes the set includes 8 point sockets. I bought mine from the Snap-on Dealer before I retired and was working. I am sure they are still available, and probably available from sears if you get their tool catalog along with other took manufactures