The in485P has two rows of press-fit connectors on the bottom of the board.
They can be pressed into 1.00mm holes on a 1.6mm thick (standard PCB thickness) target board.
No special tool is required, they can be inserted by applying firm pressure to the connectors.
Once fitted to the target board, the board is very secure, and can not be removed by hand any more.
A screwdriver or similar tool can be used to remove the board if required. If the in485P is to be soldered onto the target board, 1.10mm holes can be used. This will allow it to be inserted
much easier than with 1.00mm holes. When using 1.10mm holes, the board can be removed by hand.