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This DB9 D-SUB solder-free breakout board is designed for RS232 serial port conversion and wiring. It comes with one male and one female DB9 connector, fitted with black insulation rubber core and extended long bolts for firm mounting. Screw terminal design allows direct wire connection without soldering, saving installation time. Standard 9-pin definition works perfectly with PLC, serial printers, industrial controllers and RS232 communication devices. A supporting screwdriver is included for convenient assembly, ideal for serial debugging, industrial control wiring and electronic project modification.