The important thing about wire-wrap sockets: they have square-ish pins. As you wrap the wire around the square pin, there is a mind-boggling degree of force be

The important thing about wire-wrap sockets: they have square-ish pins. As you wrap the wire around the square pin, there is a mind-boggling degree of force between the corner and the wire, creating a gas-tight seal. It's tougher to get a good wrap onto a round pin. You can buy square-pin headers from peconnectors