EFIXTK 3PCS Mini Solderless Breadboard,400 Ties Clear Circuit PCB Board Kit for Proto Shield Circboard Prototyping

These aren’t perfectly flat, and some of the interior rails completely block some of the holes in the outer plastic casing. This makes it difficult to plug an Arduino Micro or similar (with headers soldered on) directly into it.Of the three I received, I was really only able to use one with my Pro Micro.If you are plugging individual wires or components into these, they will probably suit your needs. I managed to make all 3 of them work for me in some capacity, hence the three stars instead of one or two. Just don't count on being able to use every single pin and you should be fine.

Used this in an engineering lab course. I only ever needed one. Then I used two more of these for daisy chaining wires in an Arduino project. Works great for the standard wire gauge.

Nice addition to beginning electrical engineering class where I needed some new boards to supplement some damaged pins in other boards. Students use them for many different uses without issue and if they need another one they just snap right on to their existing builds.

The 3 boards that I got were warped in two directions, thus 'cup shaped'.Worse, leads are not gripped well. I could easily pull out my Arduino leads that come with a pretty significant pin on the end of the wires. They often came out without my knowing about it.Also, the leads can flop around in the holes. There is no structure inside to maintain a vertical alignment of the inserted wire.I'm looking for better quality.

Everyone that messes with electronics needs at least two of these in their arsenal. However, I would pick up one that is a little bit higher quality. These are cheap as all heck and they are curled slightly. Out of the box all three of mine had a quite significant twist/ curl in the plastic. I epoxied one of mine down to a piece of Lexan to try and straighten it out but it didn't work as well as I thought it would

The little plastic tongue and grove to hold them together did not really work. I had to mount down on a board. And... some of the sockets were really hard to get a wire lead in from a component and some of them didn't make very good contact...Maybe I should have reduced the stars...

These boards are bigger than I really needed, but I now have lots of options for future projects.

Mostly the boards are what you'd expect, and the adhesive is super strong.However with very little handing the +/- power rail line ink rubbed off after just 3 weeks of use. Not a show stopper, but I won't buy these again.