These high quality 3.50mm (~0.137″) Terminal blocks are a great way to make semi permanent connections between PCB and loose wiring. These are not breadboard compatible, but are often found on many add-on boards for the Raspberry Pi and Arduino so they are good to have around. The screw terminals are rated for 300V and 10A and can accept 16 – 28 AWG wires. Each 2 pin section can be snapped together to form larger strips using locking tabs on each side.