Why people don't buy craftsman anymore

Interesting tidbit on impact vs. standard sockets...Leans toward Impacts being less likely to crack (under an impact) but I would think that would be across the board. Interesting.....
"Some of the key differences between impact vs. regular sockets are directly linked to the former’s need for additional strength. First and foremost is the metals that are used. Rather than a chrome vanadium finish as found on most hand sockets, impact units are made out of chrome molybdenum, which is then carbonized, giving them a flat black look.

Molybdenum as a metal is more capable of absorbing vibration than vanadium, which is prone to cracking and splitting when repeatedly slammed by an impact driver’s hammers. The carbonized metal also helps improve the overall strength of the metal itself.

You’ll also find a locking pin inside most impact sockets to keep it from vibrating off of the tool while it’s in use.

Choose Wisely
Can you use impact sockets with hand tools? Definitely, although you’ll notice that they are heavier than standard sockets and may be too thick at the borders to fit into tighter spots. Can you use regular sockets with an impact gun? You can, but you’re running the risk of shortening the life of the socket due to the vibration and stress associated with the driver."