20PCS 2.54mm Breakaway PCB Board 40Pin Male and Female Header Connector for Arduino Shield

Not sure what to say, they're headers. They do what they do, and break apart easily. Fast delivery.

The header worked well in my electronic project. Fit together is adequate.

Used these to interface to an Arduino. Changes can be made in the future if needed to acommodate wiring changes with new header without having to modify the Arduino. I keep some empty pins on the header to secure extra grip force when header is inserted into Arduino sockets.

This kit of male and female PCB board pins have been great. I have used these pins in many different configurations and they always have worked well for me.

Female side does not breakaway cleanly as they are not pre-scored. You will lose a pin in the process. Scoring yourself helps, but not ideal. Male side works as intended.