These thumbscrews are available in two colours; Black and Silver.
They come in packs of 6x, and will put an unusual but stylish look to your custom PC set-up.
Large in size, which helps to tighten them, and undo them from your PC case.
The look and shape reminds me of something that would be to do with Warhammer stuff.
Overall they are cheap, look excellent, do a brilliant job, as well as giving your custom PC set-up a unique look.
Allowing you easy access inside and outside of your PC case.
Better still you could do a Gothic, LOTR, or similar type theme custom PC modified set-up.
Using these as a starting point.
You can find them at; http://www.bleujour.com/