Specifications: 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 Connector Hole 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'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