Mill-Max sockets type 0305. Two sockets are needed per switch. In case you don’t have enough room between your PCB and case consider mill max 7305 from here.
Mill Max sockets are for turning your exotic PCB or your regular keyboard into hot swappable keyboard, so you can try different switches any time you want. You can choose 10 sockets (enough for 5 MX style switches) to try it out or for your crazy layout up to 65 switches by choosing 130 bundle option. Many boards support Mill Max sockets like DZ60, Anne Pro, Kyria etc
Sockets will not work with Kailh Choc Low Profile switches, Kailh Pro Switches, and/or with any other switches that have different legs between each other.
What’s the difference between Mill-Max 0305 and 7305 and Holtites ?