Screw terminal for all 9 pins.Anti-oxidation, better contacts.Simple and quick connections installation.Female DB9 connector with screwlocks/jack screws.9 signal name, serial number clearly marked, the board sides are marked.Female DB9 with screwlock/jack screws for mounting the adaptor board to a wall box or panel that has a DB9 cut-out.These adapter boards can be mounted directly to the equipment without using extension cables.Used for experimentation or prototype work with RS-232 serial ports, I/O cards, and any other device that uses a DB9 connector.Item Name: Breakout Board ConnectorHole Diameter: 33mm/1.30" (Approx.)Size: 38mm x 30mm x 14mm/1.50" x 1.18" x 0.55" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Included:1 x DB9 9-pin Female RS-232 Breakout Board Connector