50PCS 2.54mm 0.1" Pitch PCB Mount Screw Terminal Block Connector, 2P 3P 4P Terminals 150V 6A for 26-18AWG Cable

Good quality. The container box is compact, doesn't eat up a lot of space on the workbench, and once you have it figured out it's easy to open and close. The connectors insert into standard perfboard just fine. I use a lot of 2, 3, and 4 position, especially a lot of 2's: this kit has lots of 2's. ...... I do most of my wiring with 29 AWG solid hookup wire, these aren't rated for 29 AWG but work just fine if you insert the wire right. .... As with most connectors of this type, the screws are tiny, you need a small jeweler's screwdriver.EDIT. I misread the wire stripper, my hookup wire is 26 AWG.

A lot of small pitch connectors. They work fine.

I have used this product for breadboards, and it works perfectly. The quality is really good.

Make sure your circuit board is designed for this unit.

I felts these would help connect and disconnect my prototypes fast. I love ‘em. For example, I hooked a 2pin to my battery case leads and now I can easily plug it into the breadboard.A downside is that I wasn’t able to gang them side by side. There’s just enough pressure pressing between them that they warp/gap at the top. I had to skip a hole.Now that I have them I wish it had a few longer blocks. I saw a project where somebody soldered an 8 pin to a breakout board for easy wiring. Live and learn.

I found that maybe a quarter of the 2-position blocks would bind and not close down on 22 awg wire before the screw would bind and feel tight. Had to desolder and replace a few of them on my project.The openings are too small for a 22 awg wire but that is probably a limit from the pin pitch.

For my circuits. Great addition to my Electronics Laboratory Bench.

Easy to solder in place. Great for connecting leads.