A simple holder for countersinks. The diameters for what each countersink is usable is written on the base. The diameters for the shafts are 6, 8, 10 and 12 mm.

I made this stand for these countersinks: https://www.amazon.de/Querlochsenker-Malayas%C2%AE4-Entgratsenker-Kegelsenker-Entgratung/dp/B01G7ZQ078/ref=cm_cr_arp_d_product_top?ie=UTF8
But i think any other brand will work also.

If you have any suggestions or wishes, please let me know.