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

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

A lot of small pitch connectors. They work fine.

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.

I had originally written a bad review, thinking that the screws on these devices easily stripped (which they may, because they are so small - so don't overtighten). However, it turns out that the jewelers screwdriver I was using was slipping (the blade was spinning inside the handle) so it wasn't a problem with the terminal, but with my screwdriver! So, so-far these terminals are working well. I agree with another reviewer who said you can't put 2 of them side-by-side because they are just a bit too wide. However, if you really needed to, you could probably sand or file the sides to make them fit next to each other. FYI, you need a VERY small screwdriver to tighten these.

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

Even with an appropriate screwdriver, these blocks dont tighten down and the screws just strip off. Ruined a whole board using these. Dont buy.UPDATE: After a LOT of fiddling, I determined that the clamps hinge sort of backwards and are delivered completely closed. You have to crank them backwards at first, even though they LOOK completely open. This is my fault, so I adjusted my rating. 3 stars because the screw are pretty poor quality.

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.

Very helpful that the vendor provided the dimensional drawing in the item description. The kit contains 10 4-conductor and 20 each of three conductor and two conductor. All screw terminals in general are for temporary connections, they will eventually come loose if subjected to stress and vibration. But crimping pins on connectors at 2.54 mm pitch is a pain unless you have the tools to do it so I use these screw terminals a lot.