"I have a Kobalt passthrough socket set that I got a few years ago and the issue I've had is the sockets are so much bigger in diameter that I couldn't fit them in the areas I needed the passthrough for. I was mostly working on automotive interiors and didn't feel like getting a set of deep-sockets and thought this design would work great. If you have a ton of room around your hardware its awesome, especially for turning nuts onto all-thread. Besides that The sockets have been too bulky for the applications I would want to use them on"