Is the item sent from EU, or outside EU?
- it's a neat product, and somewhat usefull imho.
I do have one idea, or request to make it super usefull for someone like me:
The top, where the spring and washer is located, can easily be flipped around - so a double sided board can be worked without the clamps has to be worked each time the board is flipped.
The height should not vary too much between top and bottom work side, if possible.
A strong magnet on the bottom item sticking to the base plate - and a weaker magnet in the top, with a ferromagnetic core embedded inside the spring/washer item?
(Yep, the PCBite has bitten and cracked itself on an iron toothache
)