These socket set have oblong drive tools that fit oblong drive sockets. Even Alloy Artifacts does not show them and calls it a failed drive. I thought there was one oblong size, about 3/8 x 1/2", but recently bought some oblong Walden sockets and they came with two additional sizes. The top picture shows the sets with the recently bought sockets below. The second picture shows the three oblong drive sizes, the bottom sockets being the 3/8 x 1/2", the middle sockets being about 7/16 x 17/32" and the top sockets being about 1/2 x 19/32. The last picture shows the drive tool from the two sets, one being just an allen wrench with an oblong end and the other being a breaker bar which can be converted to a tee driver. I'm interested if anyone has drive tools in the two larger sizes, or input on the whole situation.