This is a splittable 2 pin dual female jumper wire, it is super flexible, With some of these, you will no need to worry about the jumper wires you got before do not fit your project, just split it and go.
This is a high-quality, easy to use 40 pin ZIF socket that is 0.6" wide with gold-plated contacts. Compatible with 0.3" up to 0.6" wide ICs up to 40-pins. Makes for easy connecting or programming to many DIP ICs. High conductivity terminals create solid connections. Armature makes it easy to open and close socket.