Extendable Ratchet Set

Seems kind of like a gimmick.

That said, they could be really handy working in tight spots, and adjusting the length of the ratchet to the space you have to work would be pretty nice. Probably work just fine in a lot of situations, but I don't think I would want to put a lot of torque on them. I be the 1/4" and 3/8" ones would work pretty well, not sure I would bother with the 1/2" just because of the torque factor.

Something that would be handy for an enthusiast that you probably wouldn't find in a professional's box.