We've just taken delivery of some new production kit. It's bespoke, one-off, custom-made gear, possibly even rarer than Shoot Blues sadly missing Samyang uncoated lenses

The kit is precision made, but it weighs a tonne. This is what it looks like:

So, the questions are...

1. What are these called?
2. What are they for?
3. Who made ours?

Answers on a postcard please, before Rob drops them on his foot.