130pcs Solderless Flexible Breadboard Jumper Wires Male to Male for Arduino Breadboard

What's in Package 1pcs 40-pin male to female jumper wires 1pcs 40-pin male to male jumper wires 1pcs 40-pin female to female jumper wires Product Features Material: copper-clad aluminum,PVC Each cable length: about 20 cm /8-inches The male ends meant for insertion into standard 0.1"(2.54mm) female sockets and the female ends are meant for insertion into standard 0.1"(2.54mm) male headers. The cables can be separated into single root as you request to do multiple connection.   What are they used for? Widely used in electronic projects for connections . It can be used for the expansion of the experimental board pin and increase experimental projects. You can quickly conduct circuit testing without welding. It can be reused if the terminal is not damaged.