These modular plug connectors are used in making telephone and networking cables.
The best standard combination for making computer networking of Cat5E or Cat6 cable is the modular plug 70-619 using modular crimping tool 70-0317.
Connector comes with gold plated contacts.
There are several types of modular connectors available below.

The best standard combination for making computer networking of Cat5E or Cat6 cable is the modular plug 70-619 and using modular crimping tool 70-0317.