This tool is ideal for pin insertion and extraction modular adapter. It makes the job easier by properly setting or removing typical contact pins from D-sub connectors and save time. Will work with RJ45 (8 Conductors) to DB9 RS232, RJ45 (8 Conductors) to DB25, RJ12 (6 Conductors) to DB9 RS232, RJ12 (6 Conductors) to DB25, and RJ45 (8 Conductors) to DB15 modular adapter.