IC Sockets - Packs of 3 - Various Sizes
An IC socket (Integrated Circuit socket) allows you to insert and remove chips easily from an assembled kit or project
Adafruit have a range of pins and different widths to choose from to fit a variety of different chips; choose your size from the pull-down on the right!
These are often used for soldering into a Perma Proto or PCB so that you can replace and swap chips easily. What's nice about IC sockets is that they are the same pin spacing and size so you don't have to redesign the board! For Adafruit's example photo, they put the socket into an Adafruit Perma-Proto Breadboard but any solderable PCB or protoboard will work great. Not recommended for solderless breadboards, the pins are not long enough.