Mill Max Sockets are used to enable hot swapping for standard PCB's.
Please note the 2nd photo
On the LEFT
7305 Mill-Max sockets are required when there is very little clearance under the PCB.
On the RIGHT
3305 Mill-Max sockets are used for those that want a smaller lip than what the 7305s provide.
Price is per 50 sockets. Please remember there are 2 sockets per switch when ordering.